CCNA Chapter 8

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Which OSPF wildcard mask would be appropriate to use for the given network prefix?

/13 and 0.7.255.255

The wildcard mask that is used to advertise exactly the network 192.168.160.0 with subnet mask 255.255.240.0 is what?

0.0.15.255

With the default metric settings, the OSPF cost for R1 to reach the network 172.16.1.0 is ____?

1564

Match each OSPF packet type to how it is used by a router. (Not all options are used.) advertise new information compare local topology to that sent by another router establish and maintain adjacencies query another router for additional information

In Order: advertise new information compare local topology to that sent by another router establish and maintain adjacencies query another router for additional information

Which two statements are correct about the OSPF passive-interface command? (Choose two.) a. The OSPF network will benefit from more efficient use of bandwidth and resources. b. The router will not advertise the network of the passive interface to its neighbors. c. OSPF link-state information is still sent and received through the passive interface. d. The router will not establish any OSPF neighbor relationships with routers on that link.

a. The OSPF network will benefit from more efficient use of bandwidth and resources. d. The router will not establish any OSPF neighbor relationships with routers on that link.

What will an OSPF router prefer to use first as a router ID? a. any IP address that is configured using the router-id command b. a loopback interface that is configured with the highest IP address on the router c. the highest active interface IP that is configured on the router d. the highest active interface that participates in the routing process because of a specifically configured network statement

a. any IP address that is configured using the router-id command

What are three entries that are displayed by the show ip ospf neighbor command? (Choose three.) a. the route metric and neighbor next hop address b. the router ID of the neighboring routers c. the OSPF state of each interface d. the OSPF process ID used to establish the adjacency e. the OSPF area number shared by the neighbor routers f. the IP address of the neighbor router interface to which this router is directly connected

b. the router ID of the neighboring routers c. the OSPF state of each interface f. the IP address of the neighbor router interface to which this router is directly connected

Which statement is correct about multiarea OSPF? a. OSPF can consolidate a fragmented OSPF area into one large area b. All routers are in one area called the backbone area (area 0). c. Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers. d. OSPF multiarea increases the frequency of SPF calculation.

c. Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers.

Which statement describes a difference or similarity between OSPFv2 and OSPFv3? a. OSPFv2 requires the DR/BDR election to occur on multiaccess networks only, whereas OSPv3 requires DR/BDR elections for all network types. b. Both OSPFv2 and OSPFv3 use the router configuration network command to advertise networks. c. Both OSPFv2 and OSPFv3 use multicast destination addresses for link-state packets. d. OSPFv2 uses a 32 bit router ID and OSPFv3 uses a 128 bit router ID.

c. Both OSPFv2 and OSPFv3 use multicast destination addresses for link-state packets.

The OSPF hello timer has been set to 15 seconds on a router in a point-to-point network. By default, what is the dead interval on this router? a. 15 Seconds b. 30 Seconds c. 45 Seconds d. 60 Seconds

d. 60 Seconds

At which OSPF state are neighbor routers converged and able to exchange routing updates? a. Two-Way b. ExStart c. Exchange d. Full

d. Full

A network administrator configures a loopback interface as the OSPF router ID with the IP address of 192.168.1.1/30. What could be the consequence of using this 30-bit mask for the loopback interface? a. Older routers do not recognize the router-id command. b. The interface is not enabled for OSPF. c. OSPF routers must also be configured with a router priority value. d. This loopback interface may be advertised as a reachable network.

d. This loopback interface may be advertised as a reachable network.

A network technician issues the following commands when configuring a router: R1(config)# router ospf 11 R1(config-router)# network 10.10.10.0 0.0.0.255 area 0 What does the number 11 represent? a. the autonomous system number to which R1 belongs b. the area number where R1 is located c. the cost of the link to R1 d. the OSPF process ID on R1 e. the administrative distance that is manually assigned to R1

d. the OSPF process ID on R1

Do not use abbreviations. The command "clear ip ospf _____" forces a router with a new or changed router ID to form new adjacencies.

process


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