Which action does route poisoning take that serves as a loop-prevention method?
A.
It immediately sends routing updates with an unreachable metric to all devices.
B.
It immediately sends routing updates with a metric of 255 to all devices.
C.
It prohibits a router from advertising back onto the interface from which it was learned.
D.
It advertises a route with an unreachable metric back onto the interface from which it was
learned.
E.
It poisons the route by tagging it uniquely within the network.
With route poisoning, when a router detects that one of its connected routes has failed, the router will poison the route by assigning an infinite metric to it and advertising it to neighbors.
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I think answer D should be the right answer,
Answer A is used for convergance speedup, not for loop prevention
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Option D is poison reverse.
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