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When you send traffic on a network, the router (default gateway in Windows computer terminology) determines how to route the traffic. RIP determines where to send the traffic by determining the shortest amount of “hops.” A hop is the next router in the traffic’s path. Each router is considered a hop. With IGRP, several more factors are considered. IGRP takes into consideration the bandwidth availability, MTU, reliability and the amount of hops
In RIP, we specify only those networks that belong to us. RIP sends routing table updates to its neighbors for every 30secs. RIP uses hop count as a unit of metric. The administrative distance of RIP is 120.
IGRP uses autonomous number system. Here, only the networks that come under the same autonomous system number will communicate with each other. Autonomous number is provided by ISP. (By default, networks in different Autonomous system will not communicate, for different Autonomous systems to communicate redistributionshould be done.
GRP sends updates for every 90secs and uses bandwidth and delay as unit of metric. IGRP has an administrative distance of 100
