These LSAs contain information about every router, subnet, and other networking information.

The way the router learns this information by sending LSA (Link State Advertisements). Every router contains the same information about the network. The OSPF achieves by learning about every router and subnet within the entire network. It is based on a link-state routing algorithm in which each router contains the information of every domain, and based on this information, it determines the shortest path. It is an interior gateway protocol that has been designed within a single autonomous system.

It is an intradomain protocol, which means that it is used within an area or a network. It is a widely used and supported routing protocol. The OSPF stands for Open Shortest Path First.