What is OSPF? Open Shortest Path First is an open standard link state routing protocol which works by using Dijkastra’s SPF algorithm to find the shortest paths.   What is OSPF Router ID? OSPF Router ID is an identifier which is used to identify the Router. It is a 32-bit number.   How does a Router select its OSPF Router ID? Most of Routers (including Cisco) derive the Router ID in the following precedence order: Manually configured Router ID Highest Loopback Address Highest Physical IP Address on the Router   What are OSPF Timer (Intervals)? Below are OSPF Intervals: OSPF … Continue reading OSPF Interview Questions & Answers