Distance-Vector Routing Protocols
The distance-vector routing algorithm passes complete routing table contents to neighboring routers, which then combine the received routing table entries with their own routing tables to complete the router’s routing table. This is called routing by rumor because a router receiving an update from a neighbor router believes the information about remote networks without actually finding out for itself.
It’s possible to have a network that has multiple links to the same remote network, and if that’s the case, the administrative distance of each received update is checked first. If the AD is the same, the protocol will have to use metrics to determine the best path to use to that remote network.
RIP uses only hop ...