He studied at Meh-Mate MGU and worked as an admin. They inherited switches with a bunch of unmarked "bands" in them. I had to do an inventory. Tracking where the "strings" were laid was not possible. Therefore, it was simple: disconnect them one by one and wait for who (from which department, from which room) will call and report problems with the network. Having received a "telephonogram" - glued a marking on the cable and turned it back into the port on a swipe. Many called again and thanked for the quick solution to the problem.