Which option is an example of a static routing protocol?

Static routing involves manually configuring routes in a network, as opposed to dynamic routing protocols, which automatically adjust the routes based on the network conditions. The Routing Information Protocol (RIP) is a classic example of a dynamic routing protocol rather than a static routing protocol; it allows routers to communicate routing information with each other and automatically update routing tables.

In contrast, the other options also represent different types of routing protocols. Open Shortest Path First (OSPF) is a widely used dynamic routing protocol that operates based on the link-state routing algorithm, facilitating efficient routing in larger networks. Border Gateway Protocol (BGP) is another dynamic routing protocol, generally used for routing between different autonomous systems on the internet. Split horizon is a technique used in distance-vector routing protocols to prevent routing loops but does not qualify as a standalone routing protocol.

Therefore, recognizing the nature of RIP as a dynamic protocol leads to acknowledging that none of the listed options refer to an actual static routing protocol. This understanding is crucial for anyone studying routing technologies and protocols in networking.