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

Solution(By Examveda Team)

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).