Interior Gateway Protocol: IGP is used to learn the route of an single organization. For example, an organization has 200 branches, IGP learn all the route of that branches.
All routing protocol are work on IGP except BGP.
Exterior Gateway Protocol: EGP is used to learn the route of two Autonomous System or Two organization.
| BASIS FOR COMPARISON | DISTANCE VECTOR ROUTING | LINK STATE ROUTING |
| Algorithm | Bellman ford | Dijsktra |
| Network view | Topology information from the neighbour point of view | Complete information on the network topology |
| Best path calculation | Based on the least number of hops | Based on the cost |
| Updates | Full routing table | Link state updates |
| Updates frequency | Periodic updates | Triggered updates |
| Convergence time | Moderate | Fast |
| Updates | On broadcast | On multicast |
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