A local area network (LAN) supplies networking capability to a group of computers in close proximity to each other such as in an office building, a school,
or a home. LANs are built to enable sharing of resources - like files, printers, games or other applications - and services - like email or Internet access.

Each of these local networks may stand alone (disconnected from any other network) or may connect to other LANs and additionally a WAN (such as the Internet).

Traditional home networks are individual LANs, although it is also possible to have multiple LANs within a home (such as in homes that set up a guest network).