OSPF-4

Question 1

How do I stop individual interfaces from developing adjacencies in an OSPF network?

Answer 1

To stop routers from becoming OSPF neighbors on a particular interface, issue the passive-interface command at the interface.

Question 2

Can we have OSPF run over a GRE tunnel?

Answer 2

Yes, we can have OSPF run over a GRE tunnel.

Question 3

What is the OSPF topological database?

Answer 3

A: It stores all the LSAs received for a specific area.

Explanation: This database is used to calculate the shortest path tree using the SPF algorithm.

Question 4

What is a Link State Advertisement (LSA) in OSPF?

Answer 4

A: An LSA is a data packet containing routing and link-state information shared among routers.

Explanation: LSAs are used to build the OSPF topological database.

Question 5

What is an OSPF area?

Answer 5

A: A logical grouping of contiguous routers and networks sharing a common area ID.

Explanation: All routers in an area share the same topology table and limit LSDB scope to improve scalability.