Which of the following is a layer 3 protocol designed to permit routers to exchange information about networks that are reachable, the routes by which they may be reached, and the costs associated with such routes?

a. routing protocol
b. redistributed protocol
c. maximum protocol
d. all of the above

A

Explanation:

Routing protocol A routing protocol specifies how routers communicate with oneanother, information that enables them to select routes between any two nodes on a computer network.

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i've had the same problem. i generally just ignore it, as a ton of these "verified answers" are completely wrong.