What is WPA?
WPA stands for wifi Protected Access. WPA is a wireless security protocol designed to replace WEP with better encryption and authentication. In turn, WPA2 is a replacement for WPA. See also WEP.
How does WPA work?
WPA2 is the recommended security protocol for wifi networks. Devices can connect to a WPA-protected network with a password, security code, or using a wifi protected setup (WPS). However, routers that allow devices to connect using WPS enable a flaw that allows WPA and WPA2 to be bypassed.
WPA2 certification is mandatory for all devices that carry the wifi trademark.