...these OS/2 machines were once interconnected by a networking technology called 'token ring'.. no joke. It was basically an entire network where if one single node on the network misbehaved it would bring down the entire network - they didn't self recover either! you had to reboot them all. I remember once when I misconfigured a token ring card on a PC and it brought down the mainframe! It shut down the bank for 30 minutes"
I used to work in a place where every office on the floor was connected to the same ethernet hub. We also tested a server product that became a DHCP server if you checked the wrong box, so periodically everything would stop working until the team lead came out of his den and went to yell at the new guy.
What do you mean hubs? Back in the day we manually pierced thick Ethernet coax to get access; of course you could ruin the whole segment running tens or hundreds of meters if you didn't take care.