WLAN (Wireless LAN) is a wireless local area network
WLAN designates a local computer network on which data exchange is performed using radio signals and is described by the IEEE 802.11 standard. IEEE 802.11 is the standard of communication describing the local computer networks built on the basis of a high-frequency radio channel. WLAN treats any of three main types of wireless networks today: 802.11a, 802.11b and 802.11g. WLAN products as a rule use Wi-fi technology (Wireless Fidelity) certified by the Wi-fi Alliance group.