CCNA 3 v7 Modules 1-2:21-40

21. Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR?

• Router R4 will become the DR and router R1 will become the BDR.

• • Router R2 will become the DR and router R3 will become the BDR.

• • Router R1 will become the DR and router R2 will become the BDR.

• Router R4 will become the DR and router R3 will become the BDR

22. By default, what is the OSPF cost for any link with a bandwidth of 100 Mb/s or greater?

• • 100000000

• • 10000

• 1

• 100

23. Refer to the exhibit. What is the OSPF cost to reach the router A LAN 172.16.1.0/24 from B?

• • 782

• • 74

• • 128

• 65

24. Refer to the exhibit. On which router or routers would a default route be statically configured in a corporate environment that uses single area OSPF as the routing protocol?

• R0-A

• • ISP, R0-A, R0-B, and R0-C

• • ISP

• • R0-B and R0-C

• • ISP and R0-A

25. What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router?

• 
  

• • ping

• show ip ospf neighbor

• • show ip interface brief

• • show ip protocols

26. Refer to the exhibit. Which command did an administrator issue to produce this output?

• R1# show ip ospf interface serial0/0/1

• • R1# show ip route ospf

• • R1# show ip ospf

• • R1# show ip ospf neighbor

27. Which command is used to verify that OSPF is enabled and also provides a list of the networks that are being advertised by the network?

• • show ip interface brief

• • show ip ospf interface

• show ip protocols

• • show ip route ospf

28. Refer to the exhibit. A network administrator has configured OSPFv2 on the two Cisco routers but PC1 is unable to connect to PC2. What is the most likely problem?

• Interface Fa0/0 has not been activated for OSPFv2 on router R2.

• • Interface Fa0/0 is configured as a passive-interface on router R2.

• • Interface S0/0 is configured as a passive-interface on router R2.

• • Interface s0/0 has not been activated for OSPFv2 on router R2.

29. What is the recommended Cisco best practice for configuring an OSPF-enabled router so that each router can be easily identified when troubleshooting routing issues?

• Configure a value using the router-id command.

• • Use the highest active interface IP address that is configured on the router.

• • Use a loopback interface configured with the highest IP address on the router.

• • Use the highest IP address assigned to an active interface participating in the routing process.

30. Which step in the link-state routing process is described by a router running an algorithm to determine the best path to each destination?

• • load balancing equal-cost paths

• • declaring a neighbor to be inaccessible

• • choosing the best route

• executing the SPF algorithm