Final answer:
EIGRP is classified as a hybrid routing protocol.
Step-by-step explanation:
The correct answer is EIGRP, which stands for Enhanced Interior Gateway Routing Protocol. EIGRP is classified as a hybrid routing protocol because it combines features of both distance vector and link-state routing protocols.
EIGRP uses distance vector to advertise routes within a routing domain and link-state to exchange routing information between routers in different domains. It uses both metrics, including bandwidth, delay, reliability, and load, as well as routing tables to determine the best path for routing packets.
Other routing protocols mentioned in the answer, such as IS-IS, OSPF, and RIP, are classified as either link-state or distance vector protocols, not as hybrid routing protocols.