Cisco CCNP 642-902 Exam 25


OSPF is enabled on router A. You execute the following command on router A and receive the accompanying output: is the IP address of a loopback interface on router A, What can you conclude about router A?

A. Only the router A loopback interface is participating in the OSPF routing process.
B. None of the router A interfaces are participating in the OSPF routing process.
C. Router A is using the loopback interface IP address as its OSPF router ID.
D. Router A does not have any reachable OSPF neighbors.

Correct Answer: D

Refer to the exhibit.

What is the effect of the OSPF configuration on router B? Select the best response.

A. All interfaces will be in area 0.
B. The router will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 1.
C. The router will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 2.
D. The router will be an ABR with s1/0 in area 0, f0/0 in area 1, and f0/1 in area 2.

Correct Answer: D

Refer to the exhibit. Two routers are connected by Frame Relay and are running OSPF between them. Each router has been configured with the appropriate network statements under router ospf 1, but the routers are not forming an adjacency. Which of the following three commands could be configured on each router to correct this problem? (Choose three.)

A. RouterC(config-if)#ip ospf network broadcast
RouterD(config-if)#ip ospf network broadcast

B. RouterC(config-if)#ip ospf network point-to-point
RouterD(config-if)#ip ospf network point-to-point

C. RouterC(config-router)#neighbor

D. RouterC(config-router)#neighbor

Correct Answer: ABD

Your network has a mixture of Fast Ethernet and Gigabit Ethernet links. What needs to be done to ensure optimal data routing when using OSPF?

A. Nothing. OSPF will determine the most optimal path for routing data by default.
B. Adjust the hello and dead timers for more rapid detection of link failures.
C. Increase the reference-bandwidth used to calculate the interface default metrics, on all routers in your network.
D. Set the priority values on every broadcast interface to ensure that the designated and backup designated routers are the routers with the most processor and memory resources.
Correct Answer: C

To make OSPF area 4 a totally stubby area, which two things need to be done? (Choose two.)

A. Apply the area 4 stub command to all routers in the area.
B. On the ABR, use the area 4 stub command with the no-summary keyword.
C. On the ABR, specify a default cost for the area with the area default-cost command.
D. On the ABR, use the default-information originates command to inject a default route into area 4.
E. Use the auto-cost command on each router in the area to automatically determine the cost to other OSPF areas.

Correct Answer: AB

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