A wireless local area network (WLAN) provides wireless network communications over short distances using radio or infrared signals instead of traditional network cabling.
What is WLAN? | Setting up the Internet
WLAN stands for wireless local area network. A WLAN can be built using different wireless network protocols, usually Wi-Fi or Bluetooth.
Network security remains a major issue for WLANs. Wireless clients typically verify their identity (a process called authentication) when joining a wireless LAN. Technologies such as WPA increase the level of security on wireless networks to rival that of traditional wired networks.
A WLAN can contain a minimum of two devices and a maximum of a hundred or more. However, wireless networks become increasingly difficult to manage as the number of devices increases.