It is an Internet routing protocol that scales well, can route traffic along multiple paths, and uses knowledge of an Internet's topology to make accurate routing decisions.

Open Shortest Path First (OSPF) is a dynamic routing protocol for use in Internet Protocol (IP) networks. Specifically, it is a link-state routing protocol and falls into the group of interior gateway protocols, operating within an autonomous system (AS).

open shortest path first(ospf) is a link-state routing protocol.ospf works by using the dijkstra algorithm.
it uses event triggered updates.faster convergence,same topology held by all routers.topology table use LSA packets.

true regarding ospf areas:
*the backbone area is also called area0
*the number u can assign an area go up to 65,535
*all areas must connect to area 0

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