21.
You type debug ip rip on your router console and see that 172.16.10.0 is being advertised to you with a metric of 16. What does this mean?
Answer: C
Correct answer: The route is inaccessible.
RIP counts to infinity at 16, so a metric of 16 is not a distance but a poison: it is how a router announces that a route it once advertised is gone. Since the maximum usable metric is 15 hops, any RIP network wider than that cannot be reached at all - which is one of the protocol’s principal limitations.
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