Tuesday, 30 October 2018

What are the classes of IP Routing?



Routing protocol classes

   There are three classes of routing protocols:

·          Distance vector
·         Link state
·         Hybrid



Distance vector 

the distance vector protocol is used to find the best path to a remote network by judging distance. In RIP routing, each instance where a packet goes through a router is called a hop, and the route with the least number of hops to the network will be considered the best one. The vector indicates the direction of the remote network. RIP is a true distance-vector routing protocol and periodically sends out the entire routing table to directly connected neighbors.

Link state

Link-state protocols also called shortest-path first protocols, each router creates three separate tables. One of their tables keeps track of directly attached neighbors, one determines the topology of the entire internetwork, and one is used as the routing table. Link-state routers know more about internetwork than any distance-vector routing protocol ever could. OSPF is a true link-state routing protocol. Link-state protocols send updates containing the state of their own links to all other directly connected routers on the network. And this is then propagated to their neighbors.  
              

 Hybrid 

 Hybrid protocols use aspects of both distance-vector and link-state protocols, and EIGRP is a   great example- it is typically just called EIGRP an advanced distance-vector protocol.               

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