Question 850
For the identical prefix 172.23.189.0/24, a router evaluates these route candidates: OSPF (AD 110, via 192.0.2.117); RIP (AD 120, via 192.0.2.34); static (AD 1, via 192.0.2.100); static route was withdrawn. Ignore differences in metric across protocols. Which available source takes precedence in the routing table?
Explanation
Correct Answer
OSPF (AD 110) is the eligible same-prefix candidate with the lowest administrative distance; it is preferred over RIP (AD 120).
Incorrect Answers
The OSPF (AD 110) candidate is still eligible for this exact prefix, so it is incorrect to say that no route remains.
The static route was explicitly withdrawn; its former AD 1 does not make it an eligible candidate for this decision.
This RIP route has AD 120, higher than the eligible OSPF (AD 110); for the same prefix, Cisco chooses the lower administrative distance.