LAN (local area network) cable or Ethernet cable includes cat5e, cat6, and cat7 twisted pair cable. A LAN is a network that connects devices such as computers or printers to each other and then will connect out to the internet or phone lines via a WAN (wide area network). The cable that connects all of the devices in a LAN today is Ethernet cable. This cable comes in cat5e, cat6, and cat7; each is progressively faster and a cleaner connection than its predecessor but cat6 Ethernet cable is the most common.