A local area network (LAN) is a group of computers and devices connected within a limited geographical area, such as a home, school, or office building. LANs enable users to share resources like files, printers, and internet connections, facilitating communication and collaboration among connected devices. Typically, LANs use wired connections, such as Ethernet cables, or wireless connections, like Wi-Fi. They can vary in size and complexity, from a few devices in a small home network to hundreds of devices in a large corporate environment. Common components of a LAN include routers, switches, and access points.