Module 2

True or False? 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

Which of the following applies to the router ID? (Choose two)

• The router ID cannot be defined by an administrator.
• The router ID is not used to determine the BDR.
• The router ID is used to determine the DR.
• The router ID uniquely identifies the router.
• The router ID is not required.

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

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

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

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

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

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

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?

• Configure the network statements.
• Change the OSPFv2 process ID.
• Issue the clear ip ospf process privileged mode command.
• Change the interface priority.

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 not change from the default value.
• The Dead interval will now be 15 seconds.
• The Dead interval will now be 30 seconds.
• The Dead interval will now be 60 seconds.

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?

• redistribute connected
• redistribute static
• redistribute static subnets
• 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?

• A new Dead interval timer of four times the Hello interval will start.
• OSPF will remove that neighbor from the router’s link-state database.
• OSPF will run a new DR/BDR election.
• SPF will run and determine which neighbor router is down.

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
• the highest IP address on the LAN interfaces
• the OSPF area ID that is configured on the interface with the highest IP address
• the IP address of the interface that is configured with priority 0
• the highest IP address that is configured on the WAN interfaces

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 0.0.0.15 area 0
• network 64.100.1.64 0.0.0.31 area 0
• network 64.100.1.64 0.0.0.63 area 0
• network 64.100.1.64 0.0.0.127 area 0

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 10.1.0.0 0.0.15.255 area 0
• router(config-router)# network 10.1.1.0 0.0.0.0 area 0
• router(config-router)# network 10.1.1.0 0.0.0.255 area 0
• router(config-router)# network 10.1.1.0 0.0.255.255 area 0