In which situation would Enhanced Interior Gateway Routing Protocol (EIGRP) be applicable?

Enhanced Interior Gateway Routing Protocol (EIGRP) is designed specifically for use in environments where Cisco routers operate within the same autonomous system. This protocol leverages the benefits of both distance vector and link-state protocols, providing efficient loop-free routing and rapid convergence times.

In a setup where all routers belong to the same autonomous system, EIGRP can effectively share routing information and make informed decisions about the best paths for data transmission. It utilizes a sophisticated algorithm to maintain a reliable and optimized routing table, making it suitable for networks that need to manage a larger scale of routing information within a single administrative domain.

The other situations outlined do not align with EIGRP's intended application. For instance, deploying EIGRP in networks containing routers from various vendors or those using different protocols would be ineffective, as EIGRP is proprietary to Cisco and requires compatible configuration. Additionally, networks that solely use static routing do not benefit from the dynamic capabilities that EIGRP provides. Therefore, the context of being within the same autonomous system is crucial for EIGRP's functioning and utility.