PCA and PCB need to communicate. The path that the data takes between these end devices can travel through R1, R2, and R3, or it can travel through R4 and R5. The process by which routers select the best path depends on the routing protocol. We will examine the behavior of two distance vector routing protocols, Enhanced Interior Gateway Routing Protocol (EIGRP) and Routing Information Protocol version 2 (RIPv2).
Packet Tracer - Comparing RIP and EIGRP Path Selection Instructions
Packet Tracer - Comparing RIP and EIGRP Path Selection - PKA