What is the Administrative Distance value for iBGP routes?

• A. 20
• B. 200
• C. 0
• D. 100

Answer: (B)

Administrative Distance is the trustworthiness score assigned to routes learned from a particular routing protocol. When multiple routing sources provide a path to the same destination, the router prefers the route with the lower Administrative Distance. In BGP, external routes (eBGP) have a lower distance of 20, while internal routes (iBGP) have a higher distance of 200. So the value associated with iBGP routes is 200. This higher distance means iBGP routes are considered less trustworthy than eBGP routes, which is why an eBGP-learned path would be chosen if both exist. The other options don’t fit: 20 is for eBGP, 0 is typically for directly connected routes, and 100 is not the standard BGP Administrative Distance.