I think Roberto99 is in my position as well...

When the cable comes from a thousand foot box, and the connectors come from a bag of fifty, the resulting cable has no label on it to indicate if I made a straight through or crossover cable. Or if I missed a pin somewhere and have an entirely new wiring scheme

In my cases the label is never there (I just look at the plug when I need to verify), but I think roberto99 is a fair sight more conscientious than I am ^

Slightly OT: Bulk Cable + connectors costs significantly less than 50 pc x 10 ft @ Best Buy