Computer Networking
What is route poisoning?

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

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Computer Networking
A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?

RIP has a higher metric value for that route.
IGRP has a lower administrative distance.
The IGRP route has fewer hops.
IGRP has a faster update timer.

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