ICT Module 2 - Module Quiz - Single-Area OSPFv2 Configuration

In the router ospf process-id command, the process ID value, which can any number between 1 and 65,535, is locally significant. It must be the same on all routers in the OSPF area. (True/False)

True

Which of the following applies to the router ID?

The router ID uniquely identifies the router.

Which of the following is the order of precedence for choosing the router ID?

1. Router ID that is explicitly configured
2. Highest IPv4 loopback address
3. Highest active configured IPv4 address

Which criterion is preferred by the router to choose a router ID?

the router-id rid command

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?

0.0.0.31

The following three networks are directly connected to an OSPF router; 192.168.0.0/24, 192.168.1.0/24, and 192.168.2.0/24. Which OSPF network command would advertise only the 192.168.1.0 network to neighbors

router(config-router)# network 192.168.1.0 0.0.0.255 area 0

There are three parameters that should match in order for a pair of routers to form an adjacency when running OSPFv2. Which of the following is not included:

router ID

Which is a feature of the OSPF routing protocol?

uses Dijkstra's algorithm to build the SPF tree

Which is a feature of the OSPF routing protocol?

calculates its metric using bandwidth

A router with two LAN interfaces, two WAN interfaces, and one configured loopback interface is operating with OSPF as its routing protocol. What does the router OSPF process use to assign the router ID?

the loopback interface IP address

Which verification command would identify the specific interfaces on a router that were configured with the passive-interface command?

show ip protocols

Which command, if applied on an OSPF router, would give a Gigabit Ethernet interface a lower cost than a Fast Ethernet interface?

(config-router)# auto-cost reference-bandwidth 1000

A network administrator has just changed the router ID on a router that is working in an OSPFv2 environment. What should the administrator do to reset the adjacencies and use the new router ID?

Issue the clear ip ospf process privileged mode command.

Which command can be used to view the OSPF hello and dead time intervals?

show ip ospf interface

What does the SPF algorithm consider to be the best path to a network?

The path that includes the fastest cumulative bandwidth links.

What is one use of the router ID in OSPF routing?

The router ID can be used to break a tie in the election process.

What is the first criterion used by OSPF routers to elect a DR?

highest priority

Which command could be used on a router to ensure that an OSPF adjacency is formed with another router?

show ip ospf neighbor

A router in an OSPF enterprise network has a default static route that has been configured via the interface that connects to the ISP. Which command would the network administrator apply on this router so that other routers in the OSPF network will use this default route?

default-information originate

A router is participating in an OSPFv2 domain. What will always happen if the Dead interval expires before the router receives a Hello packet from an adjacent OSPF router?

OSPF will remove that neighbor from the router's link-state database.

Which command would be used to determine if an OSPF routing protocol- initiated relationship had been made with an adjacent router?

show ip ospf neighbor

Which command is used to verify the OSPFv2 router ID, the interfaces explicitly configured to advertise OSPF routes, the passive interfaces, the neighbors the router is receiving updates from, and the default administrative distance, which is 110 for OSPF?

show ip protocols

Two OSPFv2 routers are interconnected using a point-to-point WAN link.Which command could be used to verify the configured Hello and Dead timer intervals?

show ip ospf interface serial 0/0/0

You are troubleshooting convergence and adjacency issues in an OSPFv2 network and have noticed that network route entries are missing from the routing table. Which commands provide additional information about the state of router adjacencies, timer intervals, and the area ID?

show ip ospf interface

A network engineer has manually configured the Hello interval to 15 seconds on an interface of a router that is running OSPFv2. By default, how will the Dead interval on the interface be affected?

The Dead interval will now be 60 seconds.

What is the default router priority value for all Cisco OSPF routers?

1

What indicates to a link-state router that a neighbor is unreachable?

The router no longer receives Hello packets.

Which of the following will OSPF use when it chooses its router ID?

A loopback interface that is configured with the highest IP address on the router

An OSPF router has three directly connected networks; 10.1.0.0/16, 10.1.1.0/16, and 10.1.2.0/16. Which OSPF network command would advertise only the 10.1.1.0 network to neighbors?

router(config-router)# network 10.1.1.0 0.0.255.255 area 0

By default, what is the OSPF cost for a link with Gigabit Ethernet interfaces?

1

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 64.100.1.64 255.255.255.192. Which OSPF network statement should be configured?

network 64.100.1.64 0.0.0.63 area 0

Which of these factors will prevent two routers from forming an OSPFv2 adjacency?

Mismatched OSPF Hello or Dead timers