A hop count metric simply counts router hops. For instance, from router A it is 1 hop to network
192.168.5.0 if packets are sent out interface 192.168.3.1 (through router B) and 2 hops if packets are sent
out 192.168.1.1 (through routers C and B). Assuming hop count is the only metric being applied, the best
route is the one with the fewest hops, in this case, A-B.
But is the A-B link really the best path? If the A-B link is a DS-0 link and the A-C and C-B links are T-1
links, the 2-hop route may actually be best because bandwidth plays a role in how efficiently traffic
travels through the network.