30 Asked OSPF Interview Questions and Answers (2024)

Ques 1. What does OSPF stand for?

Open Shortest Path First

Ques 2. Explain the OSPF area types.

OSPF supports different area types, including backbone area (Area 0), regular areas, stub areas, totally stubby areas, and not-so-stubby areas (NSSA).

Ques 3. How does OSPF prevent routing loops?

OSPF uses the Dijkstra algorithm to calculate the shortest path tree, and it avoids routing loops by using the concept of a designated router (DR) on multi-access networks.

Ques 4. What is the purpose of the OSPF hello packets?

Hello packets are used for neighbor discovery and to establish and maintain adjacencies between OSPF routers.

Ques 5. Explain the OSPF LSDB (Link State Database).

The LSDB contains information about the network's topology, represented as link-state advertisements (LSAs). Routers use this database to calculate the SPF tree.