Practical TCP/IP and Ethernet Networking for Industry

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subnet masks, and hence could not support CIDR. This capability has been included with

RIPv2.

RIPv2 is a distance vector routing protocol where each router, using a special packet to

collect and share information about distances, keeps a routing table of its perspective of

the network showing the number of hops required to reach each network. RIP uses as a

metric (i.e. form of measurement) the hop counts.

In order to maintain their individual perspective of the network, routers periodically

pass copies of their routing tables to their immediate neighbors. Each recipient adds a

distance vector ...