Did you know LAN means Local Area Network?
A LAN is an interconnection among several computers and peripherals within a small geographic area.
Usually, a LAN is connected by the use of RJ45 wires, but with the rise of WiFi technology, wireless LANs are more often seen.
The LANs are used on work enviroments in order to communicate with other users on the LAN and share documentation. That way, the bussines eficiency improves.