The Open Shortest Path First (OSPF) is a dynamic routing protocol that typically has the least amount of overhead compared to other routing protocols. OSPF uses link-state routing, where routers exchange information about their directly connected links, and then compute the shortest path to each network. This reduces the amount of routing information that needs to be exchanged across the network, resulting in low overhead. Additionally, OSPF uses hierarchical routing, which further reduces overhead by dividing the network into smaller areas.
