I've always wondered why there are the two different wiring standards for Cat5 UTP cabling. The only technical difference between the two is the green and orange pair are swapped, which accomplishes the exact same thing as far as wiring goes (as long as the terminations are using the correct pin-outs).
Is there some historical reason that we have both standards? Is there a technical reason? Should I require my wiring to be one standard or the other? Or it just one of those strange and annoying things you have to deal with for no (readily apparent) reason?