In a peer-to-peer wired local area network client computers connect to the network with CAT or Fiber cables.  Traditionally CAT-5 or CAT-6 cabling is used.

The cable is run from the computers to a switch or hub thereby enabling the signal to travel from one computer to another and foster communications.

You can place a printer on the network if it has a built-in RJ-45 port or you can connect it to one of the client computers using a USB cable and share it with other users on the network.