CISCO CCNA Exam – Q168

A router receives information about network from multiple sources. What will the router consider the most reliable information about the path to that network?

A. a directly connected interface with an address of
B. a static route to network
C. a RIP update for network
D. an OSPF update for network
E. a default route with a next hop address of
F. a static route to network with a local serial interface configured as the next hop

Correct Answer: A

When there is more than one way to reach a destination, it will choose the best one based on a couple of things. First, it will choose the route that has the longest match; meaning the most specific route. So, in this case the /24 routes will be chosen over the /16 routes. Next, from all the /24 routes it will choose the one with the lowest administrative distance. Directly connected routes have an AD of 1 so this will be the route chosen.