Routing Information Protocol (RIP) - CCNA Tutorials
The Routing Information Protocol (RIP) is a dynamic routing protocol.It is inside the network to create a routing table
which helps routers to understand the layout of the network with changes in network connections. RIP is an interior gateway protocol (IGP) using the distance-vector routing algorithm.
Working of Routing Information Protocol
RIP is a distance-vector routing protocol. It uses hop count as the routing metric. 15 is the maximum number of hops allowed in RIP. RIP sends routing-update messages at regular intervals and when the network topology changes.The normal RIP updation time is 30 seconds while the hold down time is 180 seconds. RIP is based on UDP and working on the Transport layer. Routing by RIP is also called routing by rumor.
RIP Stability Features
RIP implements following mechanisms to maintain the stability. They are:
1. Split horizon
2. Route poisoning
3. Holddown mechanisms
Different versions of RIP
The major versions of Routing Information Protocols are:
1. RIP version 1
2. RIP version 2
RIP version 1is the basic RIP which doesn't support VLSM. This drawback is fixed on the RIP version 2 where it support Variable Length Subnet Mask (VLSM).RIP version 2 is using multicast where RIP version 1 is using broadcast to send routing updates.RIP version 2 multicasts routing updates to the address 220.127.116.11.RIPng is specially defined for IP version 6.
1. Interior Gateway Routing Protocol (IGRP)
2. Address Resolution Protocol (ARP)
3. Internet Control Message Protocol (ICMP)
4. Dynamic Host Configuration Protocol (DHCP)
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