A WLAN provides wireless connectivity over short to long distances with radio waves rather than traditional electrical network cabling. A WLAN extends already existing wired local area networks (LAN) to computers not attached to the LAN directly. The term ‘wireless’ denotes that the system does not require any wires connecting the computers or devices to the network. It uses radio signals for this purpose.

There are four main types of wireless local area networks: single-mode, multimode, bridged, and a packet switch. Each has its pros and cons and can be used for various applications. In single-mode networks, the primary (and least important) mode of connectivity is fixed and the secondary mode covers either one or two modes. Bridged and packet switch networks combine the features of both single and dual-mode networks. The fourth network type offers faster connectivity and provides more efficient power consumption.

An example of a single-mode network …