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 IEEE802. 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 devices of IEEE 802. 1 1 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 with wireless Internet access.
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.
Wireless network refers to the "wireless compatibility certification" in the field of wireless local area network, which is essentially a commercial certification and a wireless networking technology. In the past, computers were connected by network cables, while Wi-Fi was connected by 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.