WIFI, as a wireless network technology, used to connect computers through network cables, while Wi-Fi connected to the Internet through radio waves. Wireless router is common, so within the effective range of radio wave coverage of this wireless router, Wi-Fi connection can be used for networking. If a wireless router is connected to an ADSL line or other Internet access line, it is also called a hotspot.
Wi-Fi (pronounced as /wafa/, pronounced as /wifi/ in French), also known as "action hotspot" in Chinese, is a trademark of the manufacturer of the Wi-Fi alliance as a product brand certification, and is a wireless LAN technology created in the IEEE 802. 1 1 standard.
Based on the close relationship between the two systems, Wi-Fi is often regarded as synonymous with IEEE 802. 1 1 standard. "Wi-Fi" is often written as "Wifi" or "WiFi", but they are not recognized by the Wi-Fi alliance.
Not every product that conforms to IEEE 802. 1 1 has applied for the certification of the Wi-Fi Alliance, and the relative lack of Wi-Fi certification does not necessarily mean that it is incompatible with Wi-Fi devices.
The word Wi-Fi is often mistaken for Wi-Fi. Even the Wi-Fi Alliance itself often uses the word "Wi-Fi" in press releases and documents, and Wi-Fi also appears in a paper of ITAA. But in fact, the word Wi-Fi doesn't mean anything, and it's incomplete.
The equipment of IEEE 802. 1 1 has 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.