Which of the following is the AD for OSPF routes?

The Administrative Distance (AD) for OSPF (Open Shortest Path First) routes is 110. AD is a value used by routers to determine the trustworthiness of routing information received from different sources. The lower the AD value, the more preferred the route.

In OSPF, the AD of 110 indicates that it is considered a reliable routing protocol that can negotiate paths within an autonomous system efficiently. This value places OSPF routes above those of RIP (Routing Information Protocol), which has an AD of 120, but below those of EIGRP (Enhanced Interior Gateway Routing Protocol), which has an AD of 90 for internal routes and 170 for external routes.

When choosing between routing protocols, understanding their AD is crucial for effective routing decisions, as routers will prefer routes with lower AD values when multiple paths to the same destination exist.