A Link State Protocol (LSP) is a routing protocol that uses a link state algorithm, where each router creates lists of all neighboring routers with which it maintains a bidirectionalconnection
. In Link state Protocol, the router sends information about the state of all its data packets to all nodes of the internetworking network to avoid routing loops and reduce network traffic. The LSP method requires higher memory capacities compared to the Distance VectorAlgorithm. One of the most important link-state protocols is Open Shortest Path First (OSPF).