WiFi (Wireless) Password Security – WEP, WPA, WPA2, WPA3, WPS Explained
WPA is both forward and backward-compatible and is designed to run on existing Wi-Fi devices as a software download. In a nutshell, a WPA/WPA2 network will any network card that supports WPA or WPA2 to connect to it; whereas a WPA2 only network locks out network cards that only support the newer standard.