Final answer:
To identify the route PC1 will use to reach PC2 from its routing table, we examine the longest prefix match for PC2's IP, yet specifics of the routing table are needed to determine the exact route.
Step-by-step explanation:
To determine which route from the PC1 routing table will be used to reach PC2, we would typically examine the specifics of the routing table entries and apply the routing protocols' logic. For example, in IP routing, the router selects the route with the longest matching prefix (most specific match) for the destination IP address. Without the actual routing table entries and the destination IP address for PC2, we cannot definitively state which route will be used. However, the statement about the result only depending on the endpoints suggests we are possibly discussing a concept like path independence or perhaps the principle behind a routing protocol such as OSPF (Open Shortest Path First), which considers each path based on the cost to reach the endpoint without regard for the path taken. To further explore this concept, comparing path P1 to P2 with a composite path P1 P3 P4 P2 would involve analyzing the cost, distance, or metrics used by the particular routing protocol and the network design depicted in Figure 7.5.