Description: OSPF (Open Shortest Path First) is a link-state routing protocol used in IP networks. It is classified as an interior gateway protocol (IGP), meaning it is used to exchange routing information within an autonomous system. OSPF allows routers to discover the network topology and calculate the most efficient routes for data traffic. It uses Dijkstra’s algorithm to determine the shortest path, making it highly efficient compared to other routing protocols like RIP (Routing Information Protocol). OSPF is also scalable, meaning it can handle networks of various sizes, from small to large, and adapts well to changes in network topology. Additionally, OSPF supports multiple areas, allowing a network to be divided into more manageable segments, thus improving efficiency and traffic management. This protocol also includes features such as message authentication and the ability to perform hierarchical routing, contributing to its popularity in various network environments, including enterprise and service provider settings.