Which routing protocol typically has an administrative distance of 110?

Which routing protocol typically has an administrative distance of 110?

• A. Connected
• B. Static
• C. OSPF
• D. EIGRP internal

Answer: (C)

Administrative distance is how much a router trusts a routing source, and it always prefers the route with the lowest distance. OSPF’s default administrative distance is 110, which makes it more trustworthy than RIP (120) but less than EIGRP internal (90) and far less than directly connected (0) or static (1) routes. This is why a route learned via OSPF is chosen over RIP if both exist, but not over a route that’s directly connected or statically configured. The 110 value is the standard for OSPF, so it matches the question. The other options have different default distances: directly connected is 0, static is 1, and EIGRP internal is 90.

Administrative distance is how much a router trusts a routing source, and it always prefers the route with the lowest distance. OSPF’s default administrative distance is 110, which makes it more trustworthy than RIP (120) but less than EIGRP internal (90) and far less than directly connected (0) or static (1) routes. This is why a route learned via OSPF is chosen over RIP if both exist, but not over a route that’s directly connected or statically configured. The 110 value is the standard for OSPF, so it matches the question. The other options have different default distances: directly connected is 0, static is 1, and EIGRP internal is 90.