Which routing protocol uses the Bellman-Ford algorithm and is best suited for small networks?

Correct answer: RIP

RIP (Routing Information Protocol) uses the Bellman-Ford distance-vector algorithm and is best suited for small networks because its maximum hop count of 15 limits its scalability but makes it simple to configure and understand in small, flat topologies. Option B (EIGRP) is a Cisco proprietary advanced distance-vector protocol that uses the DUAL algorithm rather than Bellman-Ford and scales well to large networks. Option C (OSPF) is a link-state protocol that uses Dijkstra's shortest path first algorithm, not Bellman-Ford, and is designed for large, hierarchical networks. Option D (BGP) is a path-vector protocol used for inter-domain routing on the internet and uses neither Bellman-Ford nor is it suitable for small internal networks.