A technology that allows electronic devices to connect to a wireless local area network (WLAN)
Wi- Fi (pronounced: /ˈwaɪfaɪ/, French pronunciation: /wifi/), also known as "mobile hotspot" in Chinese, is a trademark of Wi-Fi Alliance manufacturers as a brand certification for products, and is a standard created in IEEE 802.11 wireless LAN technology.(Recommended learning:web front-end video tutorial)
Based on the close relationship between the two systems, some people often regard Wi-Fi as a synonymous term for the IEEE 802.11 standard. "Wi-Fi" is often written as "WiFi" or "Wifi", but these are not recognized by the Wi-Fi Alliance.
Not every product that matches IEEE 802.11 applies for Wi-Fi Alliance certification. The relative lack of Wi-Fi certified products does not necessarily mean that it is not compatible with Wi-Fi devices.
IEEE 802.11 equipment has been installed in many products on the market, such as: personal computers, game consoles, MP3 players, smartphones, tablets, printers, laptops and other peripheral devices that can access wireless Internet.
The Wi-Fi Alliance was established in 1999, and its name at the time was the Wireless Ethernet Compatibility Alliance (WECA). In October 2002, it was officially renamed Wi-Fi Alliance.
Wireless Internet access can be simply understood as wireless Internet access. Almost all smartphones, tablets, and laptops support Wi-Fi Internet access. It is the most widely used wireless network transmission technology today.
It actually converts wired network signals into wireless signals. As introduced at the beginning, a wireless router is used for reception by related computers, mobile phones, tablets, etc. that support its technology. If your mobile phone has a Wi-Fi function, you can surf the Internet without going through China Unicom's network when there is a Wi-Fi wireless signal, thus saving on traffic charges.
Wireless network Wireless Internet access is commonly used in big cities. Although the quality of wireless communication transmitted by Wi-Fi technology is not very good, the data security performance is worse than Bluetooth, and the transmission quality needs to be improved, the transmission speed is very fast. , can reach 54Mbps, meeting the needs of personal and social informatization.
The main advantage of Wi-Fi is that it does not require wiring and is not restricted by wiring conditions, so it is very suitable for the needs of mobile office users. And because the transmit signal power is less than 100mw, which is lower than the transmit power of mobile phones, Therefore, Wi-Fi Internet access is relatively the safest and healthiest.
But Wi-Fi signals are also provided by wired networks, such as ADSL at home, residential broadband, etc. As long as you connect a wireless router, the wired signals can be converted into Wi-Fi signals.
Many cities in developed countries abroad are covered with Wi-Fi signals provided by the government or large companies for residents to use. There are also many places in our country that have implemented "wireless city" projects to promote this technology. In pilot cities where 4G licenses have not been issued, many places use 4G to Wi-Fi for citizens to try out.
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