I'm in a debate with a few class members, whether or not it's possible to calculate the average hop count on a WAN network, from a topology point of view. As we know, WAN's can span throughout an entire country, or countries. I don't know if there are any mathematical equations either, as nodes can have a number of links to other nodes.
I mean an average hop count will change if a node gets taken offline. Bloody doing my head in.