RIP

Why
RIP is important because it allows us to efficiently send packets between routers in the same AS

What
RIP is an intra-AS routing protocol that lets routers within the same AS determine the least cost paths to each other. It uses the same strategy that is described in the idealized DV algorithm



Specifications

 * The cost metric is the number of hops
 * Each router in the AS must maintain a routing table with its current beliefs about how far each node is from it
 * When a router does not hear from another router in 180 seconds, it can assume that that router has died and will remove the router from its routing table. The router will then propagate updates to all of its neighbors
 * RIP is implemented as an application layer process that is able to manipulate the routing tables in the UNIX kernel and can send and receive messages over a standard socket and use a standard transport protocol.