What is route poisoning?

[A].	It sends back the protocol received from a router as a poison pill, which stops the regular updates.
[B].	It is information received from a router that can't be sent back to the originating router.
[C].	It prevents regular update messages from reinstating a route that has just come up.
[D].	It describes when a router sets the metric for a downed link to infinity.

Answer: Option D

Explanation:

Another way to avoid problems caused by inconsistent updates and to stop network loops is route poisoning. When a network goes down, the distance-vector routing protocol initiates route poisoning by advertising the network with a metric of 16, or unreachable (sometimes referred to as infinite).

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What is route poisoning?

Computer Science & Engineering :: Networking Questions and Answers : More Exercises

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