What is a LAN (local area network)?

A LAN, or Local Area Network, is defined as a computer network that typically operates within a limited geographic area, such as a single office, building, or campus. This type of network allows devices such as computers, printers, and servers to communicate and share resources efficiently within that confined space.

The primary characteristics of a LAN include its high speed and low latency compared to other types of networks, making it ideal for scenarios where users require fast, reliable access to shared resources. Additionally, LANs usually utilize Ethernet cables for wired connections, but can also incorporate wireless technologies for mobile device connectivity within the same vicinity.

In contrast, other options refer to broader networking concepts or specific types of connections that fall outside the confines of the LAN definition. For example, networks connecting multiple cities are generally classified as WANs (Wide Area Networks). Wireless networks can include various types of networks, not just LANs, and mobile device connections can be part of a LAN but do not define it. Therefore, the definition focused on a confined geographical area distinctly identifies what a LAN is.