Wi-Fi, also known as "action hotspot" in Chinese, is the trademark of the manufacturer of the wi-fi alliance as the brand authentication of the product, and it is a wireless local area network technology founded on the IEEE82.11 standard. Based on the close relationship between the two systems, Wi-Fi is often regarded as a synonym for IEEE 82.11 standard. "Wi-Fi" is often written as "WiFi" or "Wifi", but they are not recognized by the Wi-Fi alliance.

not every product that matches IEEE 82.11 needs to be certified by the Wi-Fi alliance, and the relatively lack of Wi-Fi certification does not necessarily mean that it is incompatible with Wi-Fi devices.

IEEE 82.11 devices have been installed in many products on the market, such as personal computers, game machines, MP3 players, smart phones, tablet computers, printers, notebook computers and other peripheral devices that can wirelessly access the Internet.