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Linux® Routing by Ron McCarty, Dee-Ann LeBlanc, Joe Brockmeier

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Routing Information Protocol Version 1 (RIP-1)

The Routing Information Protocol (RIP) was the first of the TCP/IP routing protocols used on what is now the Internet. There are two versions of this protocol available today: RIP-1 and RIP-2. Both of these versions are still important in today’s routing schemes—the first for backward compatibility and the second because of its broader range of capabilities.

The Algorithm

Let’s separate out the algorithm behind RIP-1 from the protocol itself for a moment. RIP-1 uses a distance vector algorithm to determine where to send packets, and a number of newer routing protocols have followed suit. To be specific, RIP-1 uses the Bellman-Ford algorithm to make its computations. This algorithm begins with the ...

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