Wi-Fi (Wireless Fidelity)

A term promulgated by the Wi-Fi Alliance that is meant to be used generically when referring to any type of 802.11 network, whether 802.11 b, 802.11 a or dual­band. Wi-Fi devices operate in both the 2.4 GHz (802.11 band 802.11 g) and 5 GHz bands (802.11 a). Wi-Fi is gaining acceptance as an alternative to a wired LAN in companies and multi-computer homes. However, when unprotected, a Wi-Fi wireless LAN can be susceptible to access from the outside by unauthorized users seeking to access the internet for free.