Routers communicate data on the optimal network routes via a routing protocol. They direct the movement of data from one location to another. Routing protocols are split into two main groups: interior gateway protocol (IGP) and exterior gateway protocol (EGP).
IGP works inside a single network, like a company or campus, while EGP connects different networks. IGRP is a type of interior gateway protocol designed to manage routes within one system.
Main Types of Interior Gateway Protocol (IGRP)
There are different gateway routing protocols under the IGP category, and IGRP is one of them. Here are the main types, including IGRP, explained:
IGRP (Interior Gateway Routing Protocol)
The IGRP routing protocol was created by Cisco. In a network, it lets servers communicate about the best routes. To find the best way, it looks at things like delay and capacity. Updating happens every 90 seconds, and it can handle up to 255 hops, or router steps. Larger networks can use it, but subnet sizes can not be changed.
RIP (Routing Information Protocol)
RIP is a simple IGP protocol. It looks for routes by counting hops, but it stops after 15 hops, which is good for small networks. Once every 30 seconds, which might make things take longer if your network is busy.
OSPF (Open Shortest Path First)
OSPF is another IGP type. It maps the network and picks the shortest path using more than just hops. It is faster than IGRP and works well in big networks.
Each type has its strengths, but IGRP stands out for its use in Cisco systems and larger setups.
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