Final answer:
RIP operates at the network layer (Layer 3) of the OSI model, while RIPv2, OSPF, and EIGRP all operate at the routing layer (Layer 3).
Step-by-step explanation:
RIP operates at the network layer (Layer 3) of the OSI model. RIPv2, OSPF, and EIGRP all operate at the routing layer (Layer 3) of the OSI model.
Specifically, RIP (Routing Information Protocol) uses hop count as its metric and is a distance vector routing protocol. RIPv2 (Routing Information Protocol version 2) is an enhanced version of RIP that includes support for subnet masks and authentication. OSPF (Open Shortest Path First) is a link-state routing protocol, which means it calculates the shortest path based on the state of the links in the network. EIGRP (Enhanced Interior Gateway Routing Protocol) is a hybrid routing protocol that combines distance vector and link-state characteristics.