Wireless English: wireless Generally speaking, "wireless" refers to radio or radio waves, in the field of communication. For other meanings, please refer to: Wireless Network (such as "Wireless Network") Television Broadcasting Co., Ltd. (also known as "Wireless TV Station") Brief description of WIFI The full name is Wireless Fidelity. 802.11b is sometimes mistakenly labeled as Wi-Fi. In fact, Wi-Fi is a trademark of the Wireless LAN Alliance (WLANA). This trademark only ensures that products using this trademark can cooperate with each other and has nothing to do with the standard itself. . But later people gradually became accustomed to using WIFI to call the 802.11b protocol. Its biggest advantage is that the transmission speed is high, which can reach 11Mbps. In addition, its effective distance is also very long, and it is also compatible with various existing 802.11DSSS devices. Laptop technology - Centrino technology is based on this standard.

The IEEE ([American] Institute of Electronics and Electrical Engineers) 802.11b wireless network specification is a variant of the IEEE802.11 network specification. The maximum bandwidth is 11Mbps. When the signal is weak or there is interference, the bandwidth can be Adjusted to 5.5Mbps, 2Mbps and 1Mbps, the automatic adjustment of bandwidth effectively ensures the stability and reliability of the network. Its main features are: fast speed and high reliability. In open areas, the communication distance can reach 305 meters. In closed areas, the communication distance is 76 meters to 122 meters. It is convenient for integration and networking with existing wired Ethernet networks. The cost is lower.

WiFi? Wireless Fidelity, wireless fidelity technology, like Bluetooth technology, is a short-range wireless technology used in offices and homes. This technology uses a frequency band near 2.4GHz, which is currently an unlicensed wireless frequency band. There are two standards currently available, namely IEEE802.11a and IEEE802.11b.