4A0-113 Nokia OSPF Routing Protocol Exam Questions and Answers

Hop count and 16

Hop count and 15

Link cost and 15

Link cost and 16

OSPF uses TCP, so the protocol number is 6.

OSPF uses UDP, so the protocol number is 17.

OSPF does not use IP.

OSPF has its own protocol number of 89.

ping static 10.5.5.5

ping static 0.0.0.0/0

ping 10.5.5.5

ping 0.0.0.0

Router LSA

AS External LSA

Intra-Area Prefix LSA

Inter-Area Prefix LSA

Network LSA

None of the statements are correct.

An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured.

An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.

An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area.

The MTU does not match on both interfaces

OSPF is not enabled on one of the routers

The Router ID is the same on both routers

A OSPF Hello has not been received from the neighbor

An OSPF database description packet has not been received from the neighbor.

The interface facing the neighbor is down.

The interface is included in a different area than the neighbor router.

The router has not received a valid OSPF Hello packet from its neighbor.

Whatever the advertised metric happens to be.

A value of 1.

This must be administratively set as there is no default value.

A value of 15.

0

1

2

3

4

Router LSA

Network LSA

Summary Network LSA

Summary Router LSA

The router with the lowest priority is the DR.

The router with the highest priority is the DR.

If priorities are the same, the DR is chosen based on the lowest RID.

If priorities are the same, the DR is chosen based on the highest RID.

Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.

Convergence will not be triggered because switches cannot run routing protocols between them.

Convergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged

Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.