1. [Picture]
Refer to the exhibit. The network that is shown is running RIPv1. The 192.168.10.0/24 network was recently added and will only contain end users. What command or set of commands should be entered on Router1 to prevent RIPv1 updates from being sent to the end user devices on the new network while still allowing this new network to be advertised to other routers?
Router1(config-router)# no router rip
Router1(config-router)# network 192.168.10.0
Router1(config-router)# no network 192.168.10.0
* Router1(config-router)# passive-interface fastethernet 0/0
Router1(config-router)# passive-interface serial 0/0/0
2. The following line was displayed in the output of the show ip route command.
R 192.168.3.0/24 [120/3] via 192.168.2.2, 00:00:30, Serial0/0
What is the value of the routing metric?
* 3
12
20
30
120
3. Which of the following is considered a limitation of RIP v1?
* RIP v1 does not send subnet mask information in its updates.
RIP v1 is not widely supported by networking hardware vendors.
RIP v1 consumes excessive bandwidth by multicasting routing updates using a Class D address.
RIP v1 requires enhanced router processors and extra RAM to function effectively.
RIP v1 does not support load balancing across equal-cost paths.
RIP v1 authentication is complicated and time-consuming to configure.
4. [Picture]
Refer to the exhibit. The Ethernet interface on Router2 goes down and the administrator notices that the route is still in the Router1 routing table. How much longer will Router1 keep the down network in its routing table before marking it as possibly down?
30 seconds
90 seconds
* 155 seconds
180 seconds
255 seconds
5. [Picture]
Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort?
no auto-summary
ip default-network 0.0.0.0
ip default-gateway 0.0.0.0
* ip route 0.0.0.0 0.0.0.0 S0/0/1
6. What are three characteristics of the RIPv1 routing protocol? (Choose three.)
supports the use of VLSM
* uses hop count as a metric
* considers a metric of 16 as infinity
has an administrative distance of 110 by default
includes the destination IP address and subnet mask in routing updates
calculates metrics using the Bellman Ford algorithm
7. [Picture]
Which of the following would be the correct command sequence to enable RIP on Router B for all connected networks?
RouterB# router rip
RouterB(router)# network 210.36.7.0
RouterB(router)# network 220.17.29.0
RouterB(router)# network 211.168.74.0
RouterB(config)# router rip
RouterB(config-router)# network 198.16.4.0
RouterB(config-router)# network 211.168.74.0
RouterB(config-router)# network 199.84.32.0
RouterB(config)# configure router rip
RouterB(config-router)# network 210.36.7.0
RouterB(config-router)# network 199.84.32.0
RouterB(config-router)# network 211.168.74.0
RouterB(config)# router rip
RouterB(config-router)# network 198.16.4.0
RouterB(config-router)# network 210.36.7.0
RouterB(config-router)# network 211.168.74.0
* RouterB(config)# router rip
RouterB(config-router)# network 198.16.4.0
RouterB(config-router)# network 210.36.7.0
RouterB(config-router)# network 220.17.29.0
8. What is the default update period in seconds for the RIP routing protocol?
10
12
15
20
* 30
60
9. [Picture]
Refer to the exhibit. What can be concluded from the routing table output of router B?
A static default route has been configured on B.
* The default-information originate command has been entered on A.
All traffic that is destined for 192.168.1.1 will be sent to address 0.0.0.0.
Hosts on the 10.16.1.0/27 network have 192.168.1.1 configured as the default gateway address.
10. [Picture]
Refer to the exhibit. A network consists of multiple routers. What can be verified when the show ip protocols command is issued on one of the routers in the network?
whether all routes in the network have been properly added to the routing table
* routing protocol configuration in use for IP on this router
operational status of routing protocols in use on all routers in the network
routing metric of each network that is listed in the routing table
11. [Picture]
Refer to the exhibit. All routers are configured with valid interface addresses in the indicated networks and are running RIPv1. The network is converged. Which routes are present in the routing tables?
All routers have all routes in their routing table.
All routers have all /30 routes, but do not have /24 routes in their routing table.
* All routers have all /30 routes. Routers A and E also have some of the /24 routes in their routing table.
All routers have all /30 routes. Routers B and D also have some of the /24 routes in their routing table.
Routers A and E have all routes. Routers B and D have only /30 routes in their routing table.
Routers A and E have only /24 routes. Routers B and D have only /30 routes in their routing table.
12. Which two statements are true regarding the characteristics of RIPv1? (Choose two).
* It is a distance vector routing protocol.
It advertises the address and subnet mask for routes in routing updates.
The data portion of a RIP message is encapsulated into a TCP segment.
* The data portion of a RIP message is encapsulated into a UDP segment.
It broadcasts updates every 15 seconds.
It allows a maximum of 15 routers in the routing domain.
13. Which command or set of commands will stop the RIP routing process?
RouterB(config)# router rip
RouterB(config-router)# shutdown
RouterB(config)# router rip
RouterB(config-router)# network no 192.168.2.0
* RouterB(config)# no router rip
* RouterB(config)# router no rip
14. [Picture]
Refer to the exhibit. All routers in the exhibit are running RIP v1. The network administrator issues the show ip route command on router A. What routes would appear in the routing table output if the network is converged? (Choose two).
* R 192.168.2.0/24 [120/1]
C 192.168.2.0/24 [120/1]
R 10.10.3.0/24 [120/0]
C 10.10.3.0/24 [120/1]
* R 10.10.1.0/24 [120/2]
R 10.10.1.0/24 [120/3]
15. Which command will display RIP activity as it occurs on a router?
* debug ip rip
show ip route
show ip interface
show ip protocols
debug ip rip config
show ip rip database
16. [Picture]
Refer to the output from the show ip route command. What can be concluded from the output of this router command?
A preferred route to the destination has not been set.
* There are two equal cost paths to network 1.0.0.0.
Both interfaces are being used equally to route traffic.
A variance must be set to load-balance across multiple paths.
17. [Picture]
Refer to the exhibit. Router1 and Router2 are running the RIPv1 protocol. The network administrator configures the command network 10.1.0.0 on Router1. What network will Router1 advertise to Router2?
10.1.0.0/16
10.1.0.0/8
10.0.0.0/16
* 10.0.0.0/8
18. [Picture]
Refer to the exhibit. Pings between the serial interfaces of the routers are successful. Hosts on each LAN can ping the Fa0/0 interface of the router to which they are directly connected through the switch. However, pings between hosts on the 10.1.1.0/24 and 10.1.2.0/24 networks are unsuccessful. What is a likely cause of this problem?
The Fa0/0 interface on R1 is configured as a passive interface.
The Fa0/0 interfaces on each router is shutdown.
* RIP is configured incorrectly on R1.
Automatic summarization is preventing the routing updates from being forwarded.
The network has not converged and R2 must wait 12 more seconds before receiving a full routing table update from R1.
19. What will happen if an interface IP address is entered for the address portion of the network command in a RIPv1 configuration instead of a network address?
The router will reject the command.
A route to the host address will be added to outgoing RIP updates.
A route to the host address will be added to the routing table.
* All interfaces in the same classful network as the configured address will be included in the RIPv1 routing process.
20. [Picture]
Refer to the exhibit. All routers that are shown are running the RIP routing protocol. All unknown IP traffic must be forwarded to the ISP. What router or set of routers are recommended to have both a default route and the default-information originate command issued to implement this forwarding policy?
only Router1
* only the gateway router
all routers in the network
only the routers with LANs needing Internet access
Sunday, 17 February 2008
Module 6 Exam
1. [Picture]
What two advantages does CIDR provide to a network? (Choose two.)
* reduced routing table size
dynamic address assignment
automatic route redistribution
* reduced routing update traffic
utomatic summarization at classful boundaries
2. [Picture]
Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
* 255.255.255.252
3. [Picture]
Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?
192.168.0.0/23
192.168.0.0/22
* 192.168.0.0/21
192.168.0.0/20
4. Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)
* 32-bit address
next hop router interface
* subnet mask
unicast host address
Layer 2 address
5. Which of the following problems does VLSM help to alleviate?
* the shortage of IP addresses
the difficulty of assigning static IP addresses to hosts in large enterprises
the complexity of implementing advanced routing protocols such as OSPF and EIGRP
the shortage of network administrators qualified in the use of RIP v1 and IGRP
6. What does VLSM allow a network administrator to do?
utilize one subnet mask throughout an autonomous system
* utilize multiple subnet masks in the same IP address space
utilize IGRP as the routing protocol in an entire autonomous system
utilize multiple routing protocols within an autonomous system
7. [Picture]
Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?
none
8
16
* 24
8. [Picture]
Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?
VLSM
* CIDR
private IP addresses
classful routing
9. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?
192.168.0.0 – 192.168.32.0/24
192.168.0.0 – 192.168.47.0/24
* 192.168.32.0 – 192.168.47.0/24
192.168.32.0 – 192.168.48.0/24
192.168.32.0 – 192.168.63.0/24
10. A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)
255.255.255.252 for QA
* 255.255.255.224 for Sales
* 255.255.255.240 for QA
255.255.255.248 for QA
255.255.255.0 for Sales
11. [Picture]
In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?
3
4
12
36
* 84
180
12. A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?
/31
/30
/29
/28
* /27
/26
13. [Picture]
An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?
192.1.1.16/26
192.1.1.96/28
192.1.1.160/28
192.1.1.196/27
* 192.1.1.224/28
192.1.1.240/28
14. Which three interior routing protocols support VLSM? (Choose three.)
* OSPF
RIP v1
* RIP v2
* EIGRP
BGP
STP
15. [Picture]
Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?
6
14
* 29
34
40
62
16. [Picture]
Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?
192.168.1.5/30
192.168.2.17/28
192.168.2.63/27
* 192.168.2.130/25
17. [Picture]
Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?
192.168.4.3/29
* 192.168.4.15/29
192.168.4.65/26
192.168.4.255/24
18. [Picture]
Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?
Because RIPv2 does not support VLSM, the subnet masks will not be allowed.
The subnets will not have enough host addresses for the given network requirements.
* The subnets overlap and will be rejected by the router.
The router will support the addressing scheme.
19. [Picture]
Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results:
1. pings from R1 to the S0/0/0 interface on R2….successful
2. pings from R1 to the Fa0/0 interface on R2….successful
3. pings from host B to hosts on the 10.1.1.0/24 network….successful
4. pings from host B to the Fa0/0 interface on R2….successful
5. pings from R2 to host B….successful.
What is the likely cause of the failure of the ping from R1 to host B?
* The default gateway on host B is not correctly set.
There are no routes back to networks connected to R1 from R2.
There is a Layer 2 problem between R2 and host B.
Host B has a defective Ethernet card.
20. What is a supernet?
the network for a default route
* a summarization of classful addresses
a network that contains both private and public addresses
a set of discontiguous networks that are controlled by an ISP
What two advantages does CIDR provide to a network? (Choose two.)
* reduced routing table size
dynamic address assignment
automatic route redistribution
* reduced routing update traffic
utomatic summarization at classful boundaries
2. [Picture]
Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection between the two routers. Which subnetwork mask would provide enough addresses for the point-to-point link with the least number of wasted addresses?
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
* 255.255.255.252
3. [Picture]
Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in the exhibit. Which summarization will work for all the subnets?
192.168.0.0/23
192.168.0.0/22
* 192.168.0.0/21
192.168.0.0/20
4. Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)
* 32-bit address
next hop router interface
* subnet mask
unicast host address
Layer 2 address
5. Which of the following problems does VLSM help to alleviate?
* the shortage of IP addresses
the difficulty of assigning static IP addresses to hosts in large enterprises
the complexity of implementing advanced routing protocols such as OSPF and EIGRP
the shortage of network administrators qualified in the use of RIP v1 and IGRP
6. What does VLSM allow a network administrator to do?
utilize one subnet mask throughout an autonomous system
* utilize multiple subnet masks in the same IP address space
utilize IGRP as the routing protocol in an entire autonomous system
utilize multiple routing protocols within an autonomous system
7. [Picture]
Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network 172.16.1.0 to Router B?
none
8
16
* 24
8. [Picture]
Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s routing table. What should the administrator implement on the network?
VLSM
* CIDR
private IP addresses
classful routing
9. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of networks are summarized by this route?
192.168.0.0 – 192.168.32.0/24
192.168.0.0 – 192.168.47.0/24
* 192.168.32.0 – 192.168.47.0/24
192.168.32.0 – 192.168.48.0/24
192.168.32.0 – 192.168.63.0/24
10. A network administrator is tasked with dividing up a class C network among the QA, Sales, and Administration departments. The QA department is made up of 10 people, the Sales is made up of 28 people, and the Administration has 6. Which two subnets masks adequately address the QA and Sales departments? (Choose two.)
255.255.255.252 for QA
* 255.255.255.224 for Sales
* 255.255.255.240 for QA
255.255.255.248 for QA
255.255.255.0 for Sales
11. [Picture]
In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address. How many valid host addresses will be unused on the three point-to-point links combined if VLSM is not used?
3
4
12
36
* 84
180
12. A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which bit mask should be used to provide for the number of host addresses required on Router A, while wasting the fewest addresses?
/31
/30
/29
/28
* /27
/26
13. [Picture]
An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the diagram. Which of the following subnet addresses can be configured in this network to provide a maximum of 14 useable addresses for this link while wasting the fewest addresses?
192.1.1.16/26
192.1.1.96/28
192.1.1.160/28
192.1.1.196/27
* 192.1.1.224/28
192.1.1.240/28
14. Which three interior routing protocols support VLSM? (Choose three.)
* OSPF
RIP v1
* RIP v2
* EIGRP
BGP
STP
15. [Picture]
Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the exhibit. This number includes the host address requirements for all router ports and hosts on that subnet. After all device and router port address assignments are determined, what will be the total number of unused host addresses available?
6
14
* 29
34
40
62
16. [Picture]
Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in each subnet. Which IP address would be usable for a host on one of the LANs in this network?
192.168.1.5/30
192.168.2.17/28
192.168.2.63/27
* 192.168.2.130/25
17. [Picture]
Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?
192.168.4.3/29
* 192.168.4.15/29
192.168.4.65/26
192.168.4.255/24
18. [Picture]
Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router running RIPv2. The Admin subnet requires 120 hosts and the Sales subnet requires 58 hosts. The network administrator assigned 10.0.1.128/25 to the Admin subnet. The Sales subnet is given 10.0.1.192/26. What will be the result of this addressing scheme?
Because RIPv2 does not support VLSM, the subnet masks will not be allowed.
The subnets will not have enough host addresses for the given network requirements.
* The subnets overlap and will be rejected by the router.
The router will support the addressing scheme.
19. [Picture]
Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24. A ping from the S0/0/0 interface on R1 to host B fails. The technician begins testing the network and has the following results:
1. pings from R1 to the S0/0/0 interface on R2….successful
2. pings from R1 to the Fa0/0 interface on R2….successful
3. pings from host B to hosts on the 10.1.1.0/24 network….successful
4. pings from host B to the Fa0/0 interface on R2….successful
5. pings from R2 to host B….successful.
What is the likely cause of the failure of the ping from R1 to host B?
* The default gateway on host B is not correctly set.
There are no routes back to networks connected to R1 from R2.
There is a Layer 2 problem between R2 and host B.
Host B has a defective Ethernet card.
20. What is a supernet?
the network for a default route
* a summarization of classful addresses
a network that contains both private and public addresses
a set of discontiguous networks that are controlled by an ISP
Module 7 Exam
1. [Picture]
Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network?
Rip version 2 does not send subnet masks in its updates.
Router A is not setup with RIP as a routing protocol.
* Rip version 2 will auto summarize routes by default.
Router B is not setup to advertise the 192.168.1.64/30 network.
2. [Picture]
Refer to the exhibit. Which two statements are true? (Choose two.)
* Router1 will install a route to 192.168.0.0/20
Router1 will install a route to 192.168.0.0/24
Router1 will install a route to 192.168.16.0/24
Router2 will install a route to 192.168.16.0/24
* Router2 will not install a route to 192.168.16.0/20
3. [Picture]
Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network?
Router1(config)# ip classless
Router1(config-router)# no passive-interface serial 0/1/1
* Router2(config-router)# version 2
Router2(config-router)# neighbor 10.0.0.2
4. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)
* RIP version 2 supports VLSM.
RIP version 2 supports more than 16 routers.
RIP version 2 supports classful (and not classless) routing
* RIP version 2 supports routing update authentication.
RIP version 2 supports multi-areas.
RIP version 2 uses the Dijkstra algorithm rather than the Bellman-Ford algorithm.
5. How are RIP v1 and RIP v2 similar to one another? (Choose three.)
* They both use hop count as a metric.
* They both have the same metric value for infinite distance.
They both broadcast their updates to their neighbors.
They both send subnet mask information in their updates.
They both provide for authentication of update sources.
* They both use split horizon to prevent routing loops.
6. [Picture]
Refer to the exhibit. Routers East and West are configured using RIPv1. Both routers are sending updates about their directly connected routes. The East router can ping the West router serial interface and West can ping the serial interface of East. However,
neither router has dynamically learned routes from the other. What is most likely the problem?
A gateway of last resort is required.
Subnetting is not supported by RIPv1.
* VLSM is not supported by RIPv1.
One of the routers needs a clock rate on the serial interface.
7. [Picture]
Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28 network?
Router1(config)# ip classless
* Router1(config-router)# network 192.168.16.0
Router1(config-router)# no passive-interface serial 0/1/1
Router2(config-router)# version 2
Router2(config-router)# neighbor 10.0.0.2
8. [Picture]
Refer to the exhibit. All routers are running RIP version 2. JAX is configured to just advertise the 10.0.0.0/24 network. CHI is configured to advertise the 172.16.0.0/16 network. A network administrator enters the commands shown in the exhibit. What changes will occur in this network?
The JAX router will ignore updates for the 172.16.0.0/16 network due to split horizon issues.
* The CHI router will install a route to the 192.168.0.0/16 network in its routing table.
The routing table for CHI will have the 192.168.0.0/16 route but it will have an S next to the route.
The ORL router will apply a 255.255.0.0 subnet mask to all networks in the routing updates it forwards.
9. [Picture]
Refer to the exhibit. A technician needs to add a new loopback interface to test routing functionality and network design. The technician enters the following set of commands on the router:
Sanford(config)# interface loopback1
Sanford(config-if)# ip address 192.168.6.62 255.255.255.252
Why does the router respond with an error?
The router does not allow loopback interface configurations.
This mask can not be used with this class of addresses.
Classless routing must be configured before this address can be added.
* The network address for Loopback1 overlaps with an already configured interface address.
The router is over the limit for the maximum paths that can be provided in the routing table.
10. What is the maximum network diameter permitted by the default metric of RIPv2?
* 15 hops
16 hops
100 hops
120 hops
255 hops
11. What are two functions of the network command used when configuring routing protocols? (Choose two.)
* identifies which networks will be included in the routing updates
identifies the hosts addresses that can be summarized in the network
used to list all addresses for remote and local networks
determines which subnet mask to apply to routing updates
* determines which interfaces can send and receive routing updates
12. [Picture]
Refer to the exhibit. What can be concluded from the output shown in the exhibit?
The routing table is limited to 2 routes.
The LAN interfaces are participating in the routing process.
One update has been sent out of each serial interface and 2 have been received.
* The no auto-summary has not been configured on this router.
13. A network administrator has been told that the company IP address infrastructure must adhere to RFC 1918. What three IP address ranges from RFC 1918 could the administrator use on the network? (Choose three.)
* 10.0.0.0/8
127.0.0.0/8
169.254.0.0/16
* 172.16.0.0/12
* 192.168.0.0/16
209.165.201.0/27
14. [Picture]
Refer to the exhibit. All routers are running RIPv1. What changes will occur in the routing table of router B if a loopback interface with an address of 10.16.1.129/27 is configured on router B?
Routes to the 10.16.1.0/27, 10.16.1.64/27, and 10.16.1.128/27 networks are added.
* A connected route to the 10.16.1.128/27 network is added.
A third route to the 10.0.0.0/8 network with RIPv1 as the source is added.
The 10.0.0.0/8 route is dropped immediately from the routing table after router B is configured.
15. A network administrator installed four new routers that are running RIPv2. Router1 is a boundary router in the RIPv2 network and has a default route configured. Once the network has converged, the network administrator enters Router1(config-router)# defaultinformation
originate on Router1. How will this affect the network?
prevents Router1 from forwarding updates about networks that are not directly connected
causes all routers in the network to synchronize routing updates with Router1
forces Router1 to become the primary or designated router (DR) for updates
* propagates the default route to all routers in the network
16. [Picture]
Refer to the exhibit. The exhibited network contains a mixture of Cisco and non-Cisco routers. The command debug ip rip was entered on the JAX router. All routers are running the same version of RIP. Router CHI and Router ORL are not able to reach the
192.168.1.16/28 network. What is a possible solution to this problem?
Enable split horizon in the network.
* Configure RIPv2 on routers.
Add network 192.168.1.0 to the RIP configuration on the JAX router.
Configure JAX Fa0/0 as a passive interface.
Enable the Serial0/0/0 interface on the JAX router.
Change the IP address on the Fa0/0 interface of the JAX router to 192.168.1.1/24.
17. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR?
* subnet mask
destination port number
address family identifier
source and destination IP addresses
18. [Picture]
Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1?
Only version 2 updates are sent to 255.255.255.255.
* Only version 2 updates are sent to 224.0.0.9.
Both version 1 and version 2 updates are sent to 224.0.0.9.
Both version 1 and version 2 updates are sent to 255.255.255.255.
19. [Picture]
Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown. The following commands are used on each router:
router rip
network 10.0.0.0
network 172.16.0.0
When this configuration is complete, users on the LAN of each router are unable to access the remote LANs. Why?
The network statements are configured incorrectly.
A routing loop has been created.
* RIPv1 is unable to route to discontiguous subnets of a major network.
RIPv1 is unable to route networks with a /24 subnet mask.
20. RIPv2 is the configured routing protocol on the routers in a network. The command Router(config-router)# no version 2 is entered on the routers. What effect does entering this command have on routing updates?
Subnet masks will be added to the routing updates.
Routing updates will be sent out using multicast address 224.0.0.9.
* Version 1 and 2 updates will be received and the version 2 updates will not be sent.
The RIP routing process will be removed from the router and routing updates will not be forwarded.
Refer to the exhibit. If all routers are running RIP version 2, why is there no route for the 192.168.1.32/27 network?
Rip version 2 does not send subnet masks in its updates.
Router A is not setup with RIP as a routing protocol.
* Rip version 2 will auto summarize routes by default.
Router B is not setup to advertise the 192.168.1.64/30 network.
2. [Picture]
Refer to the exhibit. Which two statements are true? (Choose two.)
* Router1 will install a route to 192.168.0.0/20
Router1 will install a route to 192.168.0.0/24
Router1 will install a route to 192.168.16.0/24
Router2 will install a route to 192.168.16.0/24
* Router2 will not install a route to 192.168.16.0/20
3. [Picture]
Refer to the exhibit. Which command on which router will allow Router1 to learn about the 192.168.0.0/20 network?
Router1(config)# ip classless
Router1(config-router)# no passive-interface serial 0/1/1
* Router2(config-router)# version 2
Router2(config-router)# neighbor 10.0.0.2
4. What are two reasons to implement RIP version 2 rather than RIP version 1? (Choose two.)
* RIP version 2 supports VLSM.
RIP version 2 supports more than 16 routers.
RIP version 2 supports classful (and not classless) routing
* RIP version 2 supports routing update authentication.
RIP version 2 supports multi-areas.
RIP version 2 uses the Dijkstra algorithm rather than the Bellman-Ford algorithm.
5. How are RIP v1 and RIP v2 similar to one another? (Choose three.)
* They both use hop count as a metric.
* They both have the same metric value for infinite distance.
They both broadcast their updates to their neighbors.
They both send subnet mask information in their updates.
They both provide for authentication of update sources.
* They both use split horizon to prevent routing loops.
6. [Picture]
Refer to the exhibit. Routers East and West are configured using RIPv1. Both routers are sending updates about their directly connected routes. The East router can ping the West router serial interface and West can ping the serial interface of East. However,
neither router has dynamically learned routes from the other. What is most likely the problem?
A gateway of last resort is required.
Subnetting is not supported by RIPv1.
* VLSM is not supported by RIPv1.
One of the routers needs a clock rate on the serial interface.
7. [Picture]
Refer to the exhibit. Which command will allow Router2 to learn about the 192.168.16.0/28 network?
Router1(config)# ip classless
* Router1(config-router)# network 192.168.16.0
Router1(config-router)# no passive-interface serial 0/1/1
Router2(config-router)# version 2
Router2(config-router)# neighbor 10.0.0.2
8. [Picture]
Refer to the exhibit. All routers are running RIP version 2. JAX is configured to just advertise the 10.0.0.0/24 network. CHI is configured to advertise the 172.16.0.0/16 network. A network administrator enters the commands shown in the exhibit. What changes will occur in this network?
The JAX router will ignore updates for the 172.16.0.0/16 network due to split horizon issues.
* The CHI router will install a route to the 192.168.0.0/16 network in its routing table.
The routing table for CHI will have the 192.168.0.0/16 route but it will have an S next to the route.
The ORL router will apply a 255.255.0.0 subnet mask to all networks in the routing updates it forwards.
9. [Picture]
Refer to the exhibit. A technician needs to add a new loopback interface to test routing functionality and network design. The technician enters the following set of commands on the router:
Sanford(config)# interface loopback1
Sanford(config-if)# ip address 192.168.6.62 255.255.255.252
Why does the router respond with an error?
The router does not allow loopback interface configurations.
This mask can not be used with this class of addresses.
Classless routing must be configured before this address can be added.
* The network address for Loopback1 overlaps with an already configured interface address.
The router is over the limit for the maximum paths that can be provided in the routing table.
10. What is the maximum network diameter permitted by the default metric of RIPv2?
* 15 hops
16 hops
100 hops
120 hops
255 hops
11. What are two functions of the network command used when configuring routing protocols? (Choose two.)
* identifies which networks will be included in the routing updates
identifies the hosts addresses that can be summarized in the network
used to list all addresses for remote and local networks
determines which subnet mask to apply to routing updates
* determines which interfaces can send and receive routing updates
12. [Picture]
Refer to the exhibit. What can be concluded from the output shown in the exhibit?
The routing table is limited to 2 routes.
The LAN interfaces are participating in the routing process.
One update has been sent out of each serial interface and 2 have been received.
* The no auto-summary has not been configured on this router.
13. A network administrator has been told that the company IP address infrastructure must adhere to RFC 1918. What three IP address ranges from RFC 1918 could the administrator use on the network? (Choose three.)
* 10.0.0.0/8
127.0.0.0/8
169.254.0.0/16
* 172.16.0.0/12
* 192.168.0.0/16
209.165.201.0/27
14. [Picture]
Refer to the exhibit. All routers are running RIPv1. What changes will occur in the routing table of router B if a loopback interface with an address of 10.16.1.129/27 is configured on router B?
Routes to the 10.16.1.0/27, 10.16.1.64/27, and 10.16.1.128/27 networks are added.
* A connected route to the 10.16.1.128/27 network is added.
A third route to the 10.0.0.0/8 network with RIPv1 as the source is added.
The 10.0.0.0/8 route is dropped immediately from the routing table after router B is configured.
15. A network administrator installed four new routers that are running RIPv2. Router1 is a boundary router in the RIPv2 network and has a default route configured. Once the network has converged, the network administrator enters Router1(config-router)# defaultinformation
originate on Router1. How will this affect the network?
prevents Router1 from forwarding updates about networks that are not directly connected
causes all routers in the network to synchronize routing updates with Router1
forces Router1 to become the primary or designated router (DR) for updates
* propagates the default route to all routers in the network
16. [Picture]
Refer to the exhibit. The exhibited network contains a mixture of Cisco and non-Cisco routers. The command debug ip rip was entered on the JAX router. All routers are running the same version of RIP. Router CHI and Router ORL are not able to reach the
192.168.1.16/28 network. What is a possible solution to this problem?
Enable split horizon in the network.
* Configure RIPv2 on routers.
Add network 192.168.1.0 to the RIP configuration on the JAX router.
Configure JAX Fa0/0 as a passive interface.
Enable the Serial0/0/0 interface on the JAX router.
Change the IP address on the Fa0/0 interface of the JAX router to 192.168.1.1/24.
17. What field was added to the RIP message header by RFC 1723 to add support for VLSM and CIDR?
* subnet mask
destination port number
address family identifier
source and destination IP addresses
18. [Picture]
Refer to the exhibit. What effect will the commands that are shown have on RIP updates for Router1?
Only version 2 updates are sent to 255.255.255.255.
* Only version 2 updates are sent to 224.0.0.9.
Both version 1 and version 2 updates are sent to 224.0.0.9.
Both version 1 and version 2 updates are sent to 255.255.255.255.
19. [Picture]
Refer to the exhibit. RIPv1 is configured as the routing protocol for the network that is shown. The following commands are used on each router:
router rip
network 10.0.0.0
network 172.16.0.0
When this configuration is complete, users on the LAN of each router are unable to access the remote LANs. Why?
The network statements are configured incorrectly.
A routing loop has been created.
* RIPv1 is unable to route to discontiguous subnets of a major network.
RIPv1 is unable to route networks with a /24 subnet mask.
20. RIPv2 is the configured routing protocol on the routers in a network. The command Router(config-router)# no version 2 is entered on the routers. What effect does entering this command have on routing updates?
Subnet masks will be added to the routing updates.
Routing updates will be sent out using multicast address 224.0.0.9.
* Version 1 and 2 updates will be received and the version 2 updates will not be sent.
The RIP routing process will be removed from the router and routing updates will not be forwarded.
Module 8 Exam
1. [Picture]
Refer to the exhibit. What can be determined from this output?
The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.
The parent route for these networks was removed from the routing table.
A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.
* All of the routes listed are network routes.
2. [Picture]
Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the
routing table that matches the destination network for this packet, what does the router do next?
searches for a default route to forward the packet
drops the packet since the static route does not have an exit interface
* performs a recursive lookup to find the exit interface used to forward the packet
sends a request to neighboring routers for the location of the 128.107.0.0 network
3. [Picture]
Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
* 172.16.0.0/16
172.16.0.0/24
172.16.0.0/30
172.16.1.0/16
172.16.1.0/24
4. The following entry is displayed in the routing table:
R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1
What type of route is this?
a level 1 parent route
a level 1 supernet route
* a level 1 ultimate network route
a level 2 child route
a level 2 ultimate child route
5. [Picture]
Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown
child routes of 172.16.0.0/24 will not be dropped?
Issue the ip default-network command
use a classful routing protocol such as RIPv1
enable either OSPF or ISIS as the routing protocol
issue the ip classless command
* do nothing, ip classless is on by default
6. [Picture]
Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
drop the packet
forward the packet via the route to 10.16.1.0
forward the packet via the route to 10.16.1.64
* use the default route
7. [Picture]
Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?
3
4
5
* 7
8
8. [Picture]
Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?
drop the packet
* send packet out Serial 0/0/1
send packet to network 0.0.0.0
send packet out FastEthernet 0/0
9. [Picture]
Refer to the exhibit. Which statement correctly describes this network?
EIGRP is being used
* There is at least one parent and one child route
192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes
Traffic going to 172.16.3.0 will be directed to s 0/0/1
10. [Picture]
Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?
they are dropped
sent to default gateway
* forward out interface Serial0/0/1
forward out interface FastEthernet 0/0
11. [Picture]
Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being ropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?
* ip classless
no ip classless
ip default-network 0.0.0.0
ip default-gateway 172.16.254.1
ip route 0.0.0.0 0.0.0.0 Serial 0/0/1
12. A router has the following entries in its routing table:
S 192.168.0.0/24 [1/0] via 192.168.128.2
O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1
D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0
R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1
The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?
* the static route
the OSPF route
the EIGRP route
the RIP route
13. What determines if the router implements a classless route lookup process?
Child routes are present in the routing table.
A classless routing protocol has been configured on the router.
* The command ip classless is enabled on the router.
Multiple routes with different masks to the same destination are in the routing table.
Routing table entries have a next-hop IP address and an exit interface for each child route.
14. What occurs when no ip classless is implemented on the router?
The router will only support classful IP addressing.
The router will only support classful routing protocols.
The router will use a default route, if present, when a matching route is not found in the routing table.
* The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.
15. [Picture]
Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why?
172.16.1.0/25 because it is the first ultimate route
0.0.0.0/0 because it is the lowest network number
* 172.16.0.0/25 because it is the first level 1 route
172.18.0.0/15 because it has the shortest mask
16. A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?
* the route with the smallest AD
the route with the longest address and mask match to the destination
the route with the highest bandwidth
the route with the best combination of AD and lowest cost
17. [Picture]
Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?
0.0.0.0
255.255.0.0
* 255.255.255.0
255.255.255.255
18. [Picture]
Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?
RIPv1
* RIPv2
EIGRP
OSPF
19. A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?
metric
route prefix
update timer
* administrative distance
Refer to the exhibit. What can be determined from this output?
The router will have to perform recursive lookups to forward a packet destined for 192.168.2.213/24.
The parent route for these networks was removed from the routing table.
A route to 192.168.0.0/25 would be classified as a supernet route for the routes listed in the routing table.
* All of the routes listed are network routes.
2. [Picture]
Refer to the exhibit. A packet destined for host 128.107.0.5/16 is processed by the JAX router. After finding the static route in the
routing table that matches the destination network for this packet, what does the router do next?
searches for a default route to forward the packet
drops the packet since the static route does not have an exit interface
* performs a recursive lookup to find the exit interface used to forward the packet
sends a request to neighboring routers for the location of the 128.107.0.0 network
3. [Picture]
Refer to the exhibit. What parent network will automatically be included in the routing table when the three subnets are configured on Router1?
* 172.16.0.0/16
172.16.0.0/24
172.16.0.0/30
172.16.1.0/16
172.16.1.0/24
4. The following entry is displayed in the routing table:
R 192.168.8.0/24 [120/2] via 192.168.4.1, 00:00:26, Serial0/0/1
What type of route is this?
a level 1 parent route
a level 1 supernet route
* a level 1 ultimate network route
a level 2 child route
a level 2 ultimate child route
5. [Picture]
Refer to the exhibit. Router1 is running IOS version 12.2. What will the network administrator need to do so that packets for unknown
child routes of 172.16.0.0/24 will not be dropped?
Issue the ip default-network command
use a classful routing protocol such as RIPv1
enable either OSPF or ISIS as the routing protocol
issue the ip classless command
* do nothing, ip classless is on by default
6. [Picture]
Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
drop the packet
forward the packet via the route to 10.16.1.0
forward the packet via the route to 10.16.1.64
* use the default route
7. [Picture]
Refer to the exhibit. How many routes in this output qualify for use as ultimate routes?
3
4
5
* 7
8
8. [Picture]
Refer to the exhibit. With the ip classless command issued, what will router R2 do with a packet destined for host 172.16.4.234?
drop the packet
* send packet out Serial 0/0/1
send packet to network 0.0.0.0
send packet out FastEthernet 0/0
9. [Picture]
Refer to the exhibit. Which statement correctly describes this network?
EIGRP is being used
* There is at least one parent and one child route
192.168.2.0, 192.168.3.0, and 192.168.4.0 networks are child routes
Traffic going to 172.16.3.0 will be directed to s 0/0/1
10. [Picture]
Refer to the exhibit. Router1 has been issued the ip classless command. What happens to packets destined to host 172.16.3.10?
they are dropped
sent to default gateway
* forward out interface Serial0/0/1
forward out interface FastEthernet 0/0
11. [Picture]
Refer to the exhibit. The network administrator has discovered that packets destined for servers on the 172.16.254.0 network are being ropped by Router2. What command should the administrator issue to ensure that these packets are sent out the gateway of last resort, Serial 0/0/1?
* ip classless
no ip classless
ip default-network 0.0.0.0
ip default-gateway 172.16.254.1
ip route 0.0.0.0 0.0.0.0 Serial 0/0/1
12. A router has the following entries in its routing table:
S 192.168.0.0/24 [1/0] via 192.168.128.2
O 192.168.0.0/25 [110/2175] via 172.16.1.1, 00:02:15, FastEthernet0/1
D 192.168.0.0/25 [90/22455] via 172.16.2.2, 00:12:15, Serial0/0/0
R 192.168.0.0/26 [120/2] via 172.16.3.3, 00:00:15, Serial0/0/1
The router receives a packet that is destined for a host with the address 192.168.0.58. Which route would this router use to forward the packet?
* the static route
the OSPF route
the EIGRP route
the RIP route
13. What determines if the router implements a classless route lookup process?
Child routes are present in the routing table.
A classless routing protocol has been configured on the router.
* The command ip classless is enabled on the router.
Multiple routes with different masks to the same destination are in the routing table.
Routing table entries have a next-hop IP address and an exit interface for each child route.
14. What occurs when no ip classless is implemented on the router?
The router will only support classful IP addressing.
The router will only support classful routing protocols.
The router will use a default route, if present, when a matching route is not found in the routing table.
* The router will assume it has knowledge of all subnets in the network and will not search beyond child routes for a better match.
15. [Picture]
Refer to the exhibit. The graphic contains partial contents of the routing table on router E. Router E is running version 12.3 of the IOS and is configured for default routing behavior. Router E receives a packet to forward. Which route in the routing table will be searched first and why?
172.16.1.0/25 because it is the first ultimate route
0.0.0.0/0 because it is the lowest network number
* 172.16.0.0/25 because it is the first level 1 route
172.18.0.0/15 because it has the shortest mask
16. A network is converged and the routing tables are complete. When a packet needs to be forwarded, what is the first criterion used to determine the best path in the routing table?
* the route with the smallest AD
the route with the longest address and mask match to the destination
the route with the highest bandwidth
the route with the best combination of AD and lowest cost
17. [Picture]
Refer to the exhibit. What subnet mask will Router1 apply to child routes of the 172.16.0.0/24 network?
0.0.0.0
255.255.0.0
* 255.255.255.0
255.255.255.255
18. [Picture]
Refer to the exhibit. What protocol was used to distribute the routing information for the network 172.16.1.4?
RIPv1
* RIPv2
EIGRP
OSPF
19. A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?
metric
route prefix
update timer
* administrative distance
Module 9 Exam
1. On a router running EIGRP, what database would maintain a list of feasible successors?
routing table
neighbor table
* topology table
adjacency table
2. [Picture]
Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause?
one router is a non-cisco router
* they have different autonomous-system numbers
they are using difference sequence numbers
they are sending incorrect hello types
3. [Picture]
Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the 192.168.1.32 network on router A?
network 192.168.1.0
network 192.168.1.0 255.255.255.0
* network 192.168.1.64 0.0.0.3
network 192.168.1.64 0.0.0.7
network 192.168.1.64 0.0.0.255
4. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.)
* put the route into passive mode
* query neighbors for a new route
search routing table for a feasible successor
run the SPF algorithm to find a new successor
search topology table for a feasible successor
5. [Picture]
Refer to the exhibit. What is indicated by the P at the beginning of the topology entry?
* the route is in a stable state
the route is a preferred route
DUAL is searching for a better route to this destination
the exit interface is in passive mode and EIGRP advertisements are blocked
6. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.)
* routing
* topology
neighbor
path
shortest path
7. What information is maintained in the EIGRP topology database for a destination route? (Choose three.)
* the routing protocol
* the feasible distance of the route
the highest cost of the route
the SRTT value for the route
* the route cost as advertised by the neighboring router
the physical address of the gateway interface
8. Which of the following statements describes the bounded updates used by EIGRP?
Bounded updates are sent to all routers within an autonomous system.
* Partial updates are sent only to routers that need the information.
The updates are sent to all routers in the routing table.
Updates are bounded by the routers in the topology table.
9. Which of the following types of routes will be denoted by EX in EIGRP routing table entries? (Choose two.)
routes learned from other routing protocols
routes learned from any non-adjacent EIGRP routers
* any route with a hop count metric higher than 224
* EIGRP routes that originate in different autonomous systems
all passive routes in the routing table
10. [Picture]
Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.)
R1(config-router)# network 192.168.1.128
R1(config-router)# auto-summary
* R1(config-router)# no auto-summary
* R2(config-router)# no auto-summary
R2(config-router)# auto-summary
R2(config-router)# network 192.168.1.64
11. Which two statements describe characteristics of EIGRP? (Choose two.)
* EIGRP is a distance vector routing protocol.
* EIGRP supports classless routing and VLSM.
EIGRP is classified as a link-state routing protocol.
EIGRP uses TCP for reliable delivery of EIGRP update packets.
With EIGRP, loop-free paths are achieved through the use of hold-down timers.
EIGRP sends a periodic update every 30 minutes.
12. [Picture]
Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possible problems with adjacencies between Router1 and Router2? (Choose two.)
* The routers are configured with different EIGRP process IDs.
Automatic summarization was disabled.
The hello timer for R1 was altered.
* The serial interfaces for both routers are in different networks.
No feasible successors were found.
13. [Picture]
Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695 represent?
the route metric that is applied to those EIGRP routes for this router
the trustworthiness of the routing information source
* the composite of the hop count and bandwidth to that destination network
the total metric for that network as advertised by the EIGRP neighbor
14. [Picture]
Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?
A route to network 198.18.1.0/24 is not listed in the routing table.
Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.
EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24.
* The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.
15. [Picture]
Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?
* A,B,E
A,C,E
A,D,E
Packets will load balance across the A,B,E and A,C,E paths.
Packets will load balance across the A,B,E and A,D,E paths.
Packets will load balance across the A,C,E and A,D,E paths.
16. By default, which two metrics are used by EIGRP to determine the best path between networks?
MTU
load
* delay
* bandwidth
reliability
17. Which term defines a collection of networks under the administrative control of a single entity that presents a common routing policy to the Internet?
* autonomous system
contiguous networks
process ID
BGP
18. [Picture]
Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10. Pings between hosts on networks that are connected to router A and those that are connected to router B are successful. However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32 network. What is the most likely cause of this problem?
IP classless is enabled and is causing the packet to drop.
The command network 192.168.1.32 was not issued on router C.
* The routers are not configured in the same EIGRP routing domain.
Automatic summarization of the networks is causing the subnetted routes to be dropped.
19. In the command router eigrp 20, what is the purpose of the number 20?
specifies the administrative distance for all EIGRP routes
* identifies the autonomous system number this EIGRP process will advertise
determines what metric is added to all advertised routes
indicates the number of addresses in the EIGRP routing domain
20. The show ip eigrp topology command output on a router displays a successor route and a feasible successor route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP do when the primary route to this network fails?
The router sends query packets to all EIGRP neighbors for a better route to network 192.168
The DUAL FSM immediately recomputes the algorithm to calculate the next backup route.
Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead.
* The backup route to network 192.168.1.0/24 is installed in the routing table.
21. What administrative distance would a router assign to a default route in EIGRP that is learned from a source external to the autonomous system?
1
5
70
90
* 170
190
22. [Picture]
Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2 immediately send to Router1 and Router3?
a query for network 192.168.0.0/28
an acknowledgment packet to 224.0.0.9
an update packet that is sent to 255.255.255.255
a packet that contains the new routing table for R2
* unicast update packets to 192.168.1.1 and 192.168.2.1
routing table
neighbor table
* topology table
adjacency table
2. [Picture]
Refer to the exhibit. This is the debug output from 2 directly connected EIGRP routers. They are not forming an adjacency. What is the cause?
one router is a non-cisco router
* they have different autonomous-system numbers
they are using difference sequence numbers
they are sending incorrect hello types
3. [Picture]
Refer to the exhibit. Which command will advertise the 192.168.1.64/30 network but not the 192.168.1.32 network on router A?
network 192.168.1.0
network 192.168.1.0 255.255.255.0
* network 192.168.1.64 0.0.0.3
network 192.168.1.64 0.0.0.7
network 192.168.1.64 0.0.0.255
4. What two actions will the EIGRP DUAL FSM take if a link to a network goes down? (Choose two.)
* put the route into passive mode
* query neighbors for a new route
search routing table for a feasible successor
run the SPF algorithm to find a new successor
search topology table for a feasible successor
5. [Picture]
Refer to the exhibit. What is indicated by the P at the beginning of the topology entry?
* the route is in a stable state
the route is a preferred route
DUAL is searching for a better route to this destination
the exit interface is in passive mode and EIGRP advertisements are blocked
6. In which of the following tables does the EIGRP DUAL algorithm store the primary route to a destination? (Choose two.)
* routing
* topology
neighbor
path
shortest path
7. What information is maintained in the EIGRP topology database for a destination route? (Choose three.)
* the routing protocol
* the feasible distance of the route
the highest cost of the route
the SRTT value for the route
* the route cost as advertised by the neighboring router
the physical address of the gateway interface
8. Which of the following statements describes the bounded updates used by EIGRP?
Bounded updates are sent to all routers within an autonomous system.
* Partial updates are sent only to routers that need the information.
The updates are sent to all routers in the routing table.
Updates are bounded by the routers in the topology table.
9. Which of the following types of routes will be denoted by EX in EIGRP routing table entries? (Choose two.)
routes learned from other routing protocols
routes learned from any non-adjacent EIGRP routers
* any route with a hop count metric higher than 224
* EIGRP routes that originate in different autonomous systems
all passive routes in the routing table
10. [Picture]
Host 192.168.1.66 in the network illustrated is unable to ping host 192.168.1.130. How must EIGRP be configured to enable connectivity between the two hosts? (Choose two.)
R1(config-router)# network 192.168.1.128
R1(config-router)# auto-summary
* R1(config-router)# no auto-summary
* R2(config-router)# no auto-summary
R2(config-router)# auto-summary
R2(config-router)# network 192.168.1.64
11. Which two statements describe characteristics of EIGRP? (Choose two.)
* EIGRP is a distance vector routing protocol.
* EIGRP supports classless routing and VLSM.
EIGRP is classified as a link-state routing protocol.
EIGRP uses TCP for reliable delivery of EIGRP update packets.
With EIGRP, loop-free paths are achieved through the use of hold-down timers.
EIGRP sends a periodic update every 30 minutes.
12. [Picture]
Refer to the exhibit. Based on the output of show ip eigrp neighbors, what are two possible problems with adjacencies between Router1 and Router2? (Choose two.)
* The routers are configured with different EIGRP process IDs.
Automatic summarization was disabled.
The hello timer for R1 was altered.
* The serial interfaces for both routers are in different networks.
No feasible successors were found.
13. [Picture]
Refer to the exhibit. In the topology table, what do the numbers 3011840 and 3128695 represent?
the route metric that is applied to those EIGRP routes for this router
the trustworthiness of the routing information source
* the composite of the hop count and bandwidth to that destination network
the total metric for that network as advertised by the EIGRP neighbor
14. [Picture]
Refer to the exhibit. EIGRP is the only routing protocol enabled on this network. No static routes are configured on this router. What can be concluded about network 198.18.1.0/24 from the exhibited output?
A route to network 198.18.1.0/24 is not listed in the routing table.
Packets that are destined for 198.18.1.0/24 will be forwarded to 198.18.10.6.
EIGRP will perform equal cost load balancing across two paths when forwarding packets to 198.18.1.0/24.
* The router with interface 172.16.3.2 is a successor for network 198.18.1.0/24.
15. [Picture]
Refer to the exhibit. All interfaces have been configured with the bandwidths that are shown in the exhibit. Assuming that all routers are using a default configuration of EIGRP as their routing protocol, what path will packets take from the 172.16.1.0/16 network to the 192.168.200.0/24 network?
* A,B,E
A,C,E
A,D,E
Packets will load balance across the A,B,E and A,C,E paths.
Packets will load balance across the A,B,E and A,D,E paths.
Packets will load balance across the A,C,E and A,D,E paths.
16. By default, which two metrics are used by EIGRP to determine the best path between networks?
MTU
load
* delay
* bandwidth
reliability
17. Which term defines a collection of networks under the administrative control of a single entity that presents a common routing policy to the Internet?
* autonomous system
contiguous networks
process ID
BGP
18. [Picture]
Refer to the exhibit. The company is using EIGRP with an autonomous system number of 10. Pings between hosts on networks that are connected to router A and those that are connected to router B are successful. However, users on the 192.168.3.0 network are unable to reach users on the 192.168.1.32 network. What is the most likely cause of this problem?
IP classless is enabled and is causing the packet to drop.
The command network 192.168.1.32 was not issued on router C.
* The routers are not configured in the same EIGRP routing domain.
Automatic summarization of the networks is causing the subnetted routes to be dropped.
19. In the command router eigrp 20, what is the purpose of the number 20?
specifies the administrative distance for all EIGRP routes
* identifies the autonomous system number this EIGRP process will advertise
determines what metric is added to all advertised routes
indicates the number of addresses in the EIGRP routing domain
20. The show ip eigrp topology command output on a router displays a successor route and a feasible successor route to network 192.168.1.0/24. In order to reduce processor utilization, what does EIGRP do when the primary route to this network fails?
The router sends query packets to all EIGRP neighbors for a better route to network 192.168
The DUAL FSM immediately recomputes the algorithm to calculate the next backup route.
Packets that are destined for network 192.168.1.0/24 are sent out the default gateway instead.
* The backup route to network 192.168.1.0/24 is installed in the routing table.
21. What administrative distance would a router assign to a default route in EIGRP that is learned from a source external to the autonomous system?
1
5
70
90
* 170
190
22. [Picture]
Refer to the exhibit. Network 192.168.0.0/28 goes down. What type of packet does Router2 immediately send to Router1 and Router3?
a query for network 192.168.0.0/28
an acknowledgment packet to 224.0.0.9
an update packet that is sent to 255.255.255.255
a packet that contains the new routing table for R2
* unicast update packets to 192.168.1.1 and 192.168.2.1
Module 10 Exam
1. [Picture]
Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what is the first thing that it does to begin learning the network topology?
It sends LSP packets to Routers B and C.
It sends LSP packets to all routers in the network.
It sends Hello packets to all routers in the network.
It sends information about its directly connected neighbors to Routers A and E.
It sends information about its directly connected neighbors to all routers in the network.
* It learns about its directly connected networks when its interfaces reach the up state.
2. What two events will cause a link state router to send LSPs to all neighbors? (Choose two.)
30 second timer expires
* whenever the network topology changes
immediately after the Bellman-Ford algorithm has run
immediately after the DUAL FSM has built the topology database
* upon initial startup of router or routing protocol
3. What is the final step in the link state routing process?
successors are placed into the routing table
* SPF computes best path to each destination network
LSPs are flooded to all neighbors to converge the network
DUAL algorithm is run to find best path to destination networks
4. What two statements correctly describe the link state routing process? (Choose two.)
* each router in the area floods LSPs to all neighbors
* all routers in the area have identical link state databases
LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors
routing loops are prevented by running the Diffusing Update Algorithm (DUAL)
Reliable Transport Protocol (RTP) is the protocol used by for the delivery and reception of LSPs
5. [Picture]
Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?
hop count
uptime of the route
* cost of the link
a list of all the routing protocols in use
6. What feature do modern link-state protocols provide to minimize processing and memory requirements?
* splitting routing topologies into smaller areas
assigning lower process priorities to route calculations
using update timers to restrict routing updates
strict split horizon rules to reduce routing table entries
7. To achieve network convergence, what three steps does each link state router take? (Choose three.)
use automatic summarization to reduce the size of routing tables
* build a Link State Packet (LSP) containing the state of each directly connected link.
* flood the LSP to all neighbors, who then store all LSPs received in a database.
discover neighbors and establish adjacencies using the hello packet sent at regular intervals
* construct a complete map of the topology and compute the best path to each destination network.
use the DUAL FSM to select efficient, loop-free paths, and insert routes into the routing table
8. What speeds up convergence in a network using link-state routing?
* updates triggered by network changes
updates sent at regular intervals
updates sent only to directly connected neighbors
updates that include complete routing tables
9. Why is it difficult for routing loops to occur in networks that use link-state routing?
Each router builds a simple view of the network based on hop count.
Routers flood the network with LSAs to discover routing loops.
* Each router builds a complete and synchronized view of the network.
Routers use hold-down timers to prevent routing loops.
10. What are some of the advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)
The topology database eliminates the need for a routing table.
Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.
* Routers have direct knowledge of all links in the network and how they are connected.
* After the inital LSA flooding, they generally require less bandwidth to communicate changes in a topology.
Link-state protocols require less router processor power than distance vector protocols.
11. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?
DUAL
* Dijkstra
Bellman-Ford
Diffie-Hellman
12. [Picture]
Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use?
BOS -> ATL because this path is the least hops
BOS -> ATL because this path is highest cost
* BOS -> ORL -> JAX -> ATL because this path is the lowest cost
traffic would load balance across all links
13. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?
routing table
adjacency table
* link-state database
neighbor table
topology database
14. Which two routing protocols use Dijkstra’s shortest path first algorithm? (Choose two.)
RIPv1
RIPv2
* IS-IS
BGP
EIGRP
* OSPF
15. When are link-state packets sent to neighbors?
every 30 seconds
every 180 seconds
after the holddown time expires
* when a link goes up or down
when a routing loop occurs
16. [Picture]
Refer to the exhibit. What does JAX do with link-state packets from ORL?
sends out its updated routing table to both ORL and BOS routers
* sends out the individual link-state packets out the interface connected to BOS
queries BOS to see if it has a better route
only adds it to the local routing table and performs no other actions
17. A new network administrator is given the task of selecting an appropriate dynamic routing protocol for a software development company. The company has over 100 routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-Cisco equipment. Which routing protocol is appropriate for this company?
RIP version 2
IGRP
EIGRP
* OSPF
BGP
18. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?
* floods the LSP to neighbors
calculates the SPF algorithm
runs the Bellman-Ford algorithm
computes the best path to the destination network
19. [Picture]
Refer to the exhibit. If all routers and interfaces are configured to use a link-state routing protocol, from which routers will router D receive hello packets?
A and E
* B and C
A, B, C, and E
C only
Refer to the exhibit. When Router D is configured to use a link-state routing protocol and is added to the network, what is the first thing that it does to begin learning the network topology?
It sends LSP packets to Routers B and C.
It sends LSP packets to all routers in the network.
It sends Hello packets to all routers in the network.
It sends information about its directly connected neighbors to Routers A and E.
It sends information about its directly connected neighbors to all routers in the network.
* It learns about its directly connected networks when its interfaces reach the up state.
2. What two events will cause a link state router to send LSPs to all neighbors? (Choose two.)
30 second timer expires
* whenever the network topology changes
immediately after the Bellman-Ford algorithm has run
immediately after the DUAL FSM has built the topology database
* upon initial startup of router or routing protocol
3. What is the final step in the link state routing process?
successors are placed into the routing table
* SPF computes best path to each destination network
LSPs are flooded to all neighbors to converge the network
DUAL algorithm is run to find best path to destination networks
4. What two statements correctly describe the link state routing process? (Choose two.)
* each router in the area floods LSPs to all neighbors
* all routers in the area have identical link state databases
LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors
routing loops are prevented by running the Diffusing Update Algorithm (DUAL)
Reliable Transport Protocol (RTP) is the protocol used by for the delivery and reception of LSPs
5. [Picture]
Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?
hop count
uptime of the route
* cost of the link
a list of all the routing protocols in use
6. What feature do modern link-state protocols provide to minimize processing and memory requirements?
* splitting routing topologies into smaller areas
assigning lower process priorities to route calculations
using update timers to restrict routing updates
strict split horizon rules to reduce routing table entries
7. To achieve network convergence, what three steps does each link state router take? (Choose three.)
use automatic summarization to reduce the size of routing tables
* build a Link State Packet (LSP) containing the state of each directly connected link.
* flood the LSP to all neighbors, who then store all LSPs received in a database.
discover neighbors and establish adjacencies using the hello packet sent at regular intervals
* construct a complete map of the topology and compute the best path to each destination network.
use the DUAL FSM to select efficient, loop-free paths, and insert routes into the routing table
8. What speeds up convergence in a network using link-state routing?
* updates triggered by network changes
updates sent at regular intervals
updates sent only to directly connected neighbors
updates that include complete routing tables
9. Why is it difficult for routing loops to occur in networks that use link-state routing?
Each router builds a simple view of the network based on hop count.
Routers flood the network with LSAs to discover routing loops.
* Each router builds a complete and synchronized view of the network.
Routers use hold-down timers to prevent routing loops.
10. What are some of the advantages of using a link-state routing protocol instead of a distance vector routing protocol? (Choose two.)
The topology database eliminates the need for a routing table.
Frequent periodic updates are sent to minimize the number of incorrect routes in the topological database.
* Routers have direct knowledge of all links in the network and how they are connected.
* After the inital LSA flooding, they generally require less bandwidth to communicate changes in a topology.
Link-state protocols require less router processor power than distance vector protocols.
11. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?
DUAL
* Dijkstra
Bellman-Ford
Diffie-Hellman
12. [Picture]
Refer to the exhibit. Which statement correctly describes the path traffic would take from the 10.0.0.0/24 network to the 192.168.1.0/24 network if a link-state routing protocol was in use?
BOS -> ATL because this path is the least hops
BOS -> ATL because this path is highest cost
* BOS -> ORL -> JAX -> ATL because this path is the lowest cost
traffic would load balance across all links
13. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?
routing table
adjacency table
* link-state database
neighbor table
topology database
14. Which two routing protocols use Dijkstra’s shortest path first algorithm? (Choose two.)
RIPv1
RIPv2
* IS-IS
BGP
EIGRP
* OSPF
15. When are link-state packets sent to neighbors?
every 30 seconds
every 180 seconds
after the holddown time expires
* when a link goes up or down
when a routing loop occurs
16. [Picture]
Refer to the exhibit. What does JAX do with link-state packets from ORL?
sends out its updated routing table to both ORL and BOS routers
* sends out the individual link-state packets out the interface connected to BOS
queries BOS to see if it has a better route
only adds it to the local routing table and performs no other actions
17. A new network administrator is given the task of selecting an appropriate dynamic routing protocol for a software development company. The company has over 100 routers, uses CIDR and VLSM, requires fast convergence, and uses both Cisco and non-Cisco equipment. Which routing protocol is appropriate for this company?
RIP version 2
IGRP
EIGRP
* OSPF
BGP
18. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?
* floods the LSP to neighbors
calculates the SPF algorithm
runs the Bellman-Ford algorithm
computes the best path to the destination network
19. [Picture]
Refer to the exhibit. If all routers and interfaces are configured to use a link-state routing protocol, from which routers will router D receive hello packets?
A and E
* B and C
A, B, C, and E
C only
Module 11 Exam
1. [Picture]
Refer to the exhibit. What does the “O*E2″ from the “O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0″ line represent?
* an internal type 2 OSPF route.
an external OSPF route at least two hops away.
an external OSPF route from two different sources.
an external OSPF route that will not increment in cost.
a default route.
The route was distributed into OSPF from a type 2 router.
2. [Picture]
Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?
2
110
* 1786
1.544
3. What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.)
* area id
K-values
metric value
* hello interval
* network type
interface type
4. What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.)
root router
backup root router
domain router
backup domain router
* designated router
* backup designated router
5. What does OSPF use to calculate the cost to a destination network?
* bandwidth
bandwidth and hop count
bandwidth and reliability
bandwidth, load, and reliablity
6. A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?
All routes for the entire network will be present.
* Routes for connected networks that are operational will be in the routing table.
Because the SPF algorithm has not completed all calculations, no routes will be in the table.
A summary route for all previously learned routes will automatically appear in the routing table until all LSPs have been received by the router.
7. [Picture]
Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table?
* B(config-router)# network 192.168.1.0 0.0.0.3 area 0
B(config-router)# network 10.16.1.0 0.0.0.224 area 0
B(config-router)# network 10.16.1.0 255.255.255.224 area 0
B(config-router)# network 192.168.1.0 255.255.255.255 area 0
B(config-router)# network 10.0.0.0 255.255.255.255 area 0
8.
Refer to the exhibit. Which network command or set of sommands will cause OSPF to be enabled to send and receive packets for any R1 interface in the exhibited subnets?
R1(config-router)# network 10.0.0.0 0.0.0.0 area 0
* R1(config-router)# network 0.0.0.0 255.255.255.255 area 0
R1(config-router)# network 10.1.0.0 0.0.0.255 area 0
R1(config-router)# network 172.16.1.0 0.0.0.3 area 0
R1(config-router)# network 10.0.0.0 0.0.255.255 area 0
R1(config-router)# network 172.16.0.0 0.255.255.255 area 0
9.
Refer to the exhibit. What does the “2″ stand for in the router ospf 2 statement?
* The number 2 is the autonomous system number.
The number 2 indicates the number of networks advertised by OSPF.
The number 2 identifies this particular instance of OSPF on this router.
The number 2 indicates the priority of the OSPF process on this router.
10.
Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network?
Router C cannot win a DR election under any circumstances.
If the link for interface 192.168.1.4 goes down, router B will become the new DR.
* The highest router ID was most likely determined via an OSPF router-id statement or statements.
If a new router is added with a higher router ID than router D, it will become the DR.
11. [Picture]
Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocols command?
B(config)# int fa0/0
B(config-if)# router-id 192.168.1.5
B(config)# int lo0
B(config-if)# ip address 192.168.1.5
* B(config)# router ospf 1
B(config-router)# router-id 192.168.1.5
B (config)# router ospf 1
B(config-router)# ip address 192.168.1.5
12. [Picture]
Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?
4
5
* 6
7
10
13. What is the default administrative distance for OSPF?
90
100
* 110
115
120
14. [Picture]
Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR.
What happens immediately after the following commands are entered on router A?
A(config)# interface fa0/0
A(config-if)# ip ospf priority 255
A will become the DR. D will become the BDR.
A will become the DR. C will remain the BDR.
D will remain the DR. A will become the BDR.
* D will remain the DR. C will remain the BDR.
15. [Picture]
Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?
2
156
1564
1785
* 1787
16. What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100?
192.168.0.0/24 through 192.168.0.15/24
* 192.168.0.0/24 through 192.168.15.0/24
192.168.15.0/24 through 192.168.31.0/24
192.168.15.0/24 through 192.168.255.0/24
192.168.16.0/24 through 192.168.255.0/24
17. [Picture]
Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps must the administrator take to accomplish this?
shut down the loop back interface
use the OSPF router-id 192.168.100.1 command
use the clear ip ospf process command
* nothing, the router-id of Router1 is already 192.168.100.1
18. [Picture]
Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2?
* A FULL adjacency is formed.
A 2WAY adjacency is formed.
Router2 will become the DR and Router1 will become the BDR.
Both routers will become DROTHERS.
19. [Picture]
Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.)
* DR for network 192.168.1.200
BDR for network 192.168.1.200
DROTHER on 192.168.1.200
DR for network 192.168.1.204
* BDR for network 192.168.1.204
DROTHER on network 192.168.1.204
20. [Picture]
Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause?
* OSPF autonomous system IDs do not match.
OSPF process IDs do not match.
OSPF network types are identical.
OSPF hello or dead timers do not match.
21. [Picture]
Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0?
RouterB(config)# router ospf 10
RouterB(config-router)# gateway-of-last-resort 172.16.6.6
RouterB(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/0
* RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# router ospf 10
RouterB(config-router)# default-information originate
RouterB(config)# router ospf 10
RouterB(config-router)# default-network 172.16.6.6 0.0.0.3 area 0
RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# ip default-route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# router ospf 10
RouterB(config-router)# redistribute ip default-route
22. [Picture]
Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?
RouterB takes over as DR and RouterD becomes the BDR.
RouterD becomes the BDR and RouterA remains the DR.
RouterD becomes the DR and RouterA becomes the BDR.
RouterC acts as the DR until the election process is complete.
RouterD becomes the DR and RouterB remains the BDR.
* There is no change in the DR or BDR until either current DR or BDR goes down.
23. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)
Elections are always optional.
Elections are required in all WAN networks.
Elections are required in point-to-point networks.
* Elections are required in broadcast multiaccess networks.
* Elections are required in non-broadcast multiaccess networks.
24. [Picture]
Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)
* HQ will be DR for 10.4.0.0/16.
Router A will be DR for 10.4.0.0/16.
HQ will be BDR for 10.4.0.0/16.
Router A will be DR for 10.5.0.0/16.
* Remote will be DR for 10.5.0.0/16.
Remote will be BDR for 10.5.0.0/16.
25. [Picture]
Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero?
any traffic through the router interfaces
routing database updates
* hello packets
BPDU packets
Refer to the exhibit. What does the “O*E2″ from the “O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0″ line represent?
* an internal type 2 OSPF route.
an external OSPF route at least two hops away.
an external OSPF route from two different sources.
an external OSPF route that will not increment in cost.
a default route.
The route was distributed into OSPF from a type 2 router.
2. [Picture]
Refer to the exhibit. What is the cost of the route to the 10.0.0.0 network?
2
110
* 1786
1.544
3. What three parameters must be indentical between OSPF routers in order to form an adjacency? (Choose three.)
* area id
K-values
metric value
* hello interval
* network type
interface type
4. What does OSPF use to reduce the number of exchanges of routing information in networks where large numbers of neighbors are present? (Choose two.)
root router
backup root router
domain router
backup domain router
* designated router
* backup designated router
5. What does OSPF use to calculate the cost to a destination network?
* bandwidth
bandwidth and hop count
bandwidth and reliability
bandwidth, load, and reliablity
6. A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?
All routes for the entire network will be present.
* Routes for connected networks that are operational will be in the routing table.
Because the SPF algorithm has not completed all calculations, no routes will be in the table.
A summary route for all previously learned routes will automatically appear in the routing table until all LSPs have been received by the router.
7. [Picture]
Refer to the exhibit. Router A is correctly configured for OSPF. Which OSPF configuration statement or set of statements was entered for router B to generate the exhibited routing table?
* B(config-router)# network 192.168.1.0 0.0.0.3 area 0
B(config-router)# network 10.16.1.0 0.0.0.224 area 0
B(config-router)# network 10.16.1.0 255.255.255.224 area 0
B(config-router)# network 192.168.1.0 255.255.255.255 area 0
B(config-router)# network 10.0.0.0 255.255.255.255 area 0
8.
Refer to the exhibit. Which network command or set of sommands will cause OSPF to be enabled to send and receive packets for any R1 interface in the exhibited subnets?
R1(config-router)# network 10.0.0.0 0.0.0.0 area 0
* R1(config-router)# network 0.0.0.0 255.255.255.255 area 0
R1(config-router)# network 10.1.0.0 0.0.0.255 area 0
R1(config-router)# network 172.16.1.0 0.0.0.3 area 0
R1(config-router)# network 10.0.0.0 0.0.255.255 area 0
R1(config-router)# network 172.16.0.0 0.255.255.255 area 0
9.
Refer to the exhibit. What does the “2″ stand for in the router ospf 2 statement?
* The number 2 is the autonomous system number.
The number 2 indicates the number of networks advertised by OSPF.
The number 2 identifies this particular instance of OSPF on this router.
The number 2 indicates the priority of the OSPF process on this router.
10.
Refer to the exhibit. All routers have been configured with the interface priorities that are shown. All routers were restarted simultaneously. The results of the DR/BDR election are shown. What can be concluded about this network?
Router C cannot win a DR election under any circumstances.
If the link for interface 192.168.1.4 goes down, router B will become the new DR.
* The highest router ID was most likely determined via an OSPF router-id statement or statements.
If a new router is added with a higher router ID than router D, it will become the DR.
11. [Picture]
Refer to the exhibit. What configuration statements would give the results that are shown in the output of the show ip protocols command?
B(config)# int fa0/0
B(config-if)# router-id 192.168.1.5
B(config)# int lo0
B(config-if)# ip address 192.168.1.5
* B(config)# router ospf 1
B(config-router)# router-id 192.168.1.5
B (config)# router ospf 1
B(config-router)# ip address 192.168.1.5
12. [Picture]
Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?
4
5
* 6
7
10
13. What is the default administrative distance for OSPF?
90
100
* 110
115
120
14. [Picture]
Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR.
What happens immediately after the following commands are entered on router A?
A(config)# interface fa0/0
A(config-if)# ip ospf priority 255
A will become the DR. D will become the BDR.
A will become the DR. C will remain the BDR.
D will remain the DR. A will become the BDR.
* D will remain the DR. C will remain the BDR.
15. [Picture]
Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?
2
156
1564
1785
* 1787
16. What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100?
192.168.0.0/24 through 192.168.0.15/24
* 192.168.0.0/24 through 192.168.15.0/24
192.168.15.0/24 through 192.168.31.0/24
192.168.15.0/24 through 192.168.255.0/24
192.168.16.0/24 through 192.168.255.0/24
17. [Picture]
Refer to the exhibit. The network administrator wants to set the router ID of Router1 to 192.168.100.1. What steps must the administrator take to accomplish this?
shut down the loop back interface
use the OSPF router-id 192.168.100.1 command
use the clear ip ospf process command
* nothing, the router-id of Router1 is already 192.168.100.1
18. [Picture]
Refer to the exhibit. When OSPF is operational in the exhibited network, what neighbor relationship is developed between Router1 and Router2?
* A FULL adjacency is formed.
A 2WAY adjacency is formed.
Router2 will become the DR and Router1 will become the BDR.
Both routers will become DROTHERS.
19. [Picture]
Refer to the exhibit. Assuming that the routers have default interface OSPF priorities and no configured loopback interfaces, what two roles will router B play on each network segment? (Choose two.)
* DR for network 192.168.1.200
BDR for network 192.168.1.200
DROTHER on 192.168.1.200
DR for network 192.168.1.204
* BDR for network 192.168.1.204
DROTHER on network 192.168.1.204
20. [Picture]
Refer to the exhibit. Router1 and Router2 are running OSPF. The show ip ospf neighbor command reveals no neighbors. What is a possible cause?
* OSPF autonomous system IDs do not match.
OSPF process IDs do not match.
OSPF network types are identical.
OSPF hello or dead timers do not match.
21. [Picture]
Refer to the exhibit. Which command sequence on RouterB will redistribute a gateway of last resort to the other routers in OSPF area 0?
RouterB(config)# router ospf 10
RouterB(config-router)# gateway-of-last-resort 172.16.6.6
RouterB(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0/0
* RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# router ospf 10
RouterB(config-router)# default-information originate
RouterB(config)# router ospf 10
RouterB(config-router)# default-network 172.16.6.6 0.0.0.3 area 0
RouterB(config)# ip route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# ip default-route 0.0.0.0 0.0.0.0 172.16.6.6
RouterB(config)# router ospf 10
RouterB(config-router)# redistribute ip default-route
22. [Picture]
Refer to the exhibit. RouterA, RouterB, and RouterC in the diagram are running OSPF on their Ethernet interfaces. Router D was just added to the network. Routers are configured with the loopback interfaces (Lo 0) that are shown in the exhibit. What happens to the OSPF DR/BDR after RouterD is added to the network?
RouterB takes over as DR and RouterD becomes the BDR.
RouterD becomes the BDR and RouterA remains the DR.
RouterD becomes the DR and RouterA becomes the BDR.
RouterC acts as the DR until the election process is complete.
RouterD becomes the DR and RouterB remains the BDR.
* There is no change in the DR or BDR until either current DR or BDR goes down.
23. Which two statements describe the use of OSPF DR/BDR elections? (Choose two.)
Elections are always optional.
Elections are required in all WAN networks.
Elections are required in point-to-point networks.
* Elections are required in broadcast multiaccess networks.
* Elections are required in non-broadcast multiaccess networks.
24. [Picture]
Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)
* HQ will be DR for 10.4.0.0/16.
Router A will be DR for 10.4.0.0/16.
HQ will be BDR for 10.4.0.0/16.
Router A will be DR for 10.5.0.0/16.
* Remote will be DR for 10.5.0.0/16.
Remote will be BDR for 10.5.0.0/16.
25. [Picture]
Refer to the exhibit. What must be received between neighbors to prevent the dead time that is shown in the exhibit from reaching zero?
any traffic through the router interfaces
routing database updates
* hello packets
BPDU packets
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