There are three classes of routing protocols:
1.
Distance vector: the distance vector protocols find the best path to a remote network by judging
distance. Each time a packet goes through a router, that’s called a hop. The
route with the least number of hops to the network is determined to be the best
route. The vector indicates the direction to the remote network. Both RIP and
IGRP are distance-vector routing protocols. They send the entire routing table
to directly connected neighbors.
2.
Link State: in link-state protocols, also called shortest-path-first protocols, the routers
each create three separate tables. One of these tables keeps track of directly
attached neighbors, one determines the topology of the entire internetwork, and
is used as the routing table. Link-state routers know more about the
internetwork than any distance-vector routing protocol. OSPF is an IP routing
protocol that is completely link state. Link –state protocols send updates
containing the state of their own links to all other routers on the network.
3.
Hybrid: Hybrid protocols use aspects of both
distance vector and link state – for example, EIGRP.
No comments:
Post a Comment