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Which statement is true regarding classless routing protocols?
1. The use of discontiguous networks is not allowed.
2. The use of variable length subnet masks is permitted.
3. RIPv1 is a classless routing protocol.
4. IGRP supports classless routing within the same autonomous system.
5. RIPv2 supports classless routing.

A. 1, 3 and 5

B. 3 and 4

C. 2 and 5

D. None of the above

Answer: Option C

Solution(By Examveda Team)

Classful routing means that all hosts in the internetwork use the same mask. Classless routing means that you can use Variable Length Subnet Masks (VLSMs) and can also support discontiguous networking.

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A. Information about a route should not be sent back in the direction from which the original update came.

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D. It describes when a router sets the metric for a downed link to infinity.