What are the two types of IGP and how do they compare Which

What are the two types of IGP, and how do they compare? Which one of them appeals most to you, and why?

Solution

Distance-vector routing protocol:

This uses the bellman-ford algorithm. In these protocols, each router does not possess information about the full network topology. It advertises its distance value (DV) calculated to other routers and receives similar advertisements from other routers unless changes are done in local network or by neighbours (routers). Using these routing advertisements each router populates its routing table. In the next advertisement cycle, a router advertises updated information from its routing table. This process continues until the routing tables of each router converge to stable values.

Some of these protocols have the disadvantage of slow convergence.

Link- state routing protocol:

In this, each router possesses information about the complete network topology. Each router then independently calculates the best next hop from it for every possible destination in the network using local information of the topology. The collection of best-next-hops forms the routing table.

This contrasts with distance-vector routing protocols, which work by having each node share its routing table with its neighbours. In a link-state protocol, the only information passed between the nodes is information used to construct the connectivity maps.

Hybrid routing protocol:

Hybrid routing protocols have both the features of distance vector routing protocols and linked state routing protocols.