Which routing protocol is recognized for using link-state logic?

The chosen answer, OSPF, is recognized for employing link-state routing protocol logic. In link-state protocols, each router gathers information about the state of its links and the status of neighboring routers. This enables the router to create a complete map of the network topology. Each router then independently computes the shortest path to every other router using algorithms such as Dijkstra's algorithm.

OSPF operates within the concept of areas and uses these areas to help in the efficient management of larger networks. This area-based approach reduces the amount of routing information that must be processed, thereby improving the scalability and speed of convergence compared to distance-vector protocols.

In contrast, EIGRP, while it uses a hybrid approach that incorporates characteristics of both link-state and distance-vector protocols, does not solely rely on link-state logic. RIP, on the other hand, is a distance-vector protocol, making routing decisions based solely on the number of hops, not on the state of links. BGP is classified as a path-vector protocol used primarily for routing between autonomous systems, not for managing link-state information. Thus, OSPF stands out as the protocol associated with true link-state routing.