Top 100 OSPF Interview Questions
OSPF Interview Questions The purpose of this post is to get you equipped with the best set of questions asked for OSPF in interview: Q1: Why are loopbacks advertised as /32 host routes in OSPF? A1: Loopbacks are advertised as /32 host routes in OSPF to ensure uniqueness and stability, enabling precise reachability to individual loopback interfaces. Q2: How do I change the reference bandwidth in OSPF? A2: You can change the OSPF reference bandwidth using the "auto-cost reference-bandwidth" command followed by the desired bandwidth value. Q3: How does OSPF calculate its metric or cost? A3: OSPF calculates its metric/cost based on the bandwidth of the link. Cost = Reference bandwidth / Interface bandwidth. Q4: What algorithm is used by OSPF if equal cost routes exist? A4: OSPF uses the Shortest Path First (SPF) algorithm and load-balances over equal cost routes. Q5: Are OSPF routing protocol exchanges authenticated? A5: Yes, OSPF exchanges can be authenticated using me...