Fidelity), which is the trademark of the manufacturer of the Wi-Fi alliance and can be used as the brand certification of products, is a wireless local area network (WLAN) device based on the IEEE

82.11 standard, and is the most widely used short-range wireless transmission technology at present. Based on the close relationship between the two systems, Wi-Fi is often regarded as a synonym for IEEE

82.11 standard.

the so-called wireless network is a wireless local area network (WLAN) which uses radio waves as the medium of information transmission. It is very similar to the wired network, but the biggest difference lies in the different transmission media. Using radio technology to replace the network cable can backup each other with the wired network.

connect the internet to places where people are crowded through high-speed lines. Since the radio waves emitted from this area can reach a radius of tens of meters to 1 meters from the access point, users can access the internet at high speed as long as they bring their laptops or PDA supporting wireless LAN into this area. In other words, manufacturers do not have to spend money on network wiring access, thus saving a lot of costs, so it is called "hot spot".