OSPF Interview Questions and Answers

OSPF Interview Questions and Answers

OSPF (Open Shortest Path First) is an open standard link state routing Protocol. It is developed by IETF (Internet Engineering Task Force) as one of the IGP (Interior Gateway protocol).It is operating within a single Autonomous system. It is network layer protocol which works on the protocol no: 89 and   default Administrative Distance (AD) value is 110. OSPFv2 is used for IPv4 networks and OSPFv3 for IPv6 networks. OSPF uses a hello mechanism to detect neighbouring devices that run OSPF.

What is OSPF?

What is OSPFv3?

What are the most important features of OSPF?

What is Hop count?

What multicast address does OSPF use?

How to generate default route in OSPF?

What is OSPF Router ID?

What is Routing Protocol?

What is RIP?

What is EIGRP?

What is Linked state protocol?

What are the OSPF Packet Types?

What is Hello Packet in OSPF?

What is LSA in OSPF?

What is LSDB in OSPF?

What is DBD in OSPF?

What is LSR in OSPF?

What is LSU in OSPF?

What is LSAck in OSPF?

What are the OSPF neighbour states?

What is the multicast IPs used by OSPF? What multicast IP does DR/BDR router and non-DR use?

What are the different LSA types in OSPF?

What are the OSRF tables?

What are the OSPF Router Types?

What is internal router in OSPF?

What is ABR in OSPF?

What is ASBR in OSPF?

What is BR in OSPF?

What is OSPF super backbone area?

What problems can cause OSPF neighborship in down state?

What are the OSPF Time intervals?

What is the default hello interval?

What is the default dead interval?

What is Process id?

What is the concept of auto-cost in OSPF?