What happens when a router receives a route with an administrative distance of 255?
A. The router installs the route as the most preferred path in the routing table.
B. The router installs the route as the least preferred path in the routing table
C. The router becomes the feasible successor for the route
D. The router is unable to install the route into the routing table
D
If the administrative distance is 255, the router does not believe the source of that route and does not install the route in the routing table.
D
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/4170-ospfprocesses.html
Note: The distance 255 command gives a distance of 255 to those routes and, therefore, prevents their installation into the routing table.