A local area network (LAN) is a group of computers and devices connected within a limited area, such as a home, school, or office. This network allows users to share resources like files, printers, and internet connections, making communication and collaboration easier. LANs typically use wired connections, like Ethernet cables, or wireless connections, such as Wi-Fi. They are designed for high-speed data transfer and can support a small number of devices, usually ranging from a few to a few hundred, depending on the network's configuration and purpose.