A school district accidentally redistributes the same Internet prefixes into OSPF that edge routers already learn via eBGP. Operators want the BGP-learned paths to remain preferred in the RIB. Which statement best explains the default administrative-distance behavior they should verify?
Select an answer to reveal the explanation.
Short Explanation
Default AD is the tie-breaker referee when two protocols shout the same prefix. eBGP’s twenty usually beats OSPF’s one-ten, so the Internet path from BGP should win—unless someone rewrote the scores. Check AD before chasing weird redistribution ghosts.
Full Explanation
When identical prefixes arrive from multiple sources, Cisco IOS selects by administrative distance before comparing metrics within a protocol. Default eBGP AD (20) is preferred over OSPF (110), so BGP-learned Internet routes normally remain installed unless AD or redistribution policy was changed. Prefix length and route age are not substitutes for understanding AD interplay after accidental IGP injection of the same space.