What is the administrative distance (AD) for OSPF?

The administrative distance (AD) for OSPF (Open Shortest Path First) is 110. Administrative distance is a value that routers use to rank the trustworthiness of routing information received from different sources. The lower the AD value, the more preferred the route is.

In the context of OSPF, having an AD of 110 means that routes learned through OSPF are considered to be fairly reliable, but they are not the most preferred compared to protocols with lower administrative distances, such as those used by EIGRP or connected routes. Understanding the AD values for various routing protocols is crucial for network engineers when configuring routing protocols and troubleshooting routing issues, as it directly influences the selection of routing paths in the routing table.