OSPF Interview Question Answer For L3

In an OSPF (Open Shortest Path First) interview, candidates should be prepared to discuss essential aspects of this dynamic routing protocol used in IP networks. One common question might be, "What are the main types of OSPF routers?" A strong answer would highlight three primary router types: Internal routers, which are located within a single area; Backbone routers, responsible for routing traffic within the OSPF backbone area; and Area Border Routers (ABRs), which connect different areas of the OSPF network. Another critical topic could be the OSPF algorithm, specifically the Dijkstra Shortest Path First (SPF) algorithm, which calculates the shortest path to each node. Candidates may also need to explain the significance of OSPF metrics and how they influence routing decisions, emphasizing OSPF’s efficiency and scalability compared to other protocols like RIP or EIGRP. Understanding these concepts thoroughly will demonstrate the candidate's expertise in OSPF and prepare them for technical discussions.