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NA - RIP v1 operation is defined in RFC 1058(1988 RIP is a...

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RIP v1 operation is defined in RFC 1058 (1988) _ RIP is a Distance-Vector routing protocol _ RIP routers broadcast their entire routing table out each interface every 30 seconds ** _ RIP broadcasts are sent out on UDP port 520 _ RIP uses router “hop count” as the only metric _ Maximum hop count allowed is 15 _ A hop count >15 is considered unreachable When a change occurs in the network, the time it takes for all routers in the network to stabilize their route tables is called the “ network convergence ” time. Routing loops can occur after a network change has occurred (during network convergence) because route tables may temporarily have incorrect information. Split horizon is a technique for eliminating routing loops. The split horizon rule says that routers should not advertise a route back in the direction from which it was originally learned. Poison Reverse is another technique for eliminating routing loops. Suppose Router A learns from Router B that a link has failed (Router B sends the route with a metric of 16). Router A then sends the same route back to Router B with a metric of 16, thus ensuring that Router B will not try to send packets for that network to Router A. - Update Timer: Sends route table every 30 sec out every RIP-enabled interface _ Expiration Timer: Amount of time a route can stay in the routing table without being updated (180 sec) _ Flush Timer: Amount of time before a route is flushed from the route table (240 sec) _ Hold Down Timer: An update with a hop count greater than the router’s current metric will cause the route to go in “hold down” state for 180 sec. RIP v1 is said to be a “ Classfull ” routing protocol. This means that RIP v1 does not include subnet mask information in its’ routing updates. With a
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NA - RIP v1 operation is defined in RFC 1058(1988 RIP is a...

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