Classful vs. Classless Routing (Free Preview)

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Classless routing protocols carry subnet mask information in the routing updates when routing updates are advertised to connected networks. Classless routing allows VLSM (Variable Length Subnet Masking). Supports dis-contiguous networks.

Examples of classless routing protocols include RIPv2, EIGRP, OSPF, and IS-IS.


Classful routing protocols does not send subnet mask information when a route update is sent out.

Examples of classful routing protocols include RIPv1 and IGRP.

Back to: CCNA Routing and Switching 200-125