WLAN max (plus antenna) can reach 5KM. . . Can't compare WIFI. . . . . . IEEE, 8021B and 8021B are two different standards! The IEEE802.11a standard is the successor to IEEE802.11b. Its original design was to replace the 802.11b standard. However, it does not require a license to work in the 2.4 GHz band. The band belongs to industrial, educational, medical and other special bands and is open. It requires a license to operate in the 5.15-8.825 GHz band. WLAN is an abbreviation for Wireless Local Area Network. It refers to the application of wireless communication technology to interconnect computer equipment to form a network system that can communicate with each other and realize resource sharing. The essential feature of WLAN is that instead of using communication cables to connect computers to the network, it connects them wirelessly, which makes the construction of the network and the movement of terminals more flexible.
WLAN communication systems are typically used within the same building as an alternative to wired LANs. WLAN communicates using the ISM (Industrial, ScienTIfic, Medical) radio broadcast band. The 802.11a standard of WLAN uses the 5GHz band and supports a maximum speed of 54Mbps, while the 802.11b and 802.11g standards use the 2.4GHz band and support a maximum speed of 11Mbps and 54Mbps, respectively.
Like Bluetooth technology, Wi-Fi is the same short-range wireless technology used in offices and homes. The technology uses a frequency band near 2.4GHz, which is still currently unlicensed wireless. Two standards are currently available, namely IEEE802.11a and IEEE802.11b. This technology is favored by manufacturers due to its own advantages.
WIFI (short for Wireless Fidelity) is essentially a commercial certification. Wi-Fi certified products comply with the IEEE 802.11b wireless network standard. It is currently the most widely used WLAN standard. The frequency band used is 2.4 GHz. The IEEE 802.11b wireless network specification is a variant of the IEEE 802.11 network specification. The maximum bandwidth is 11 Mbps. In the case of weak signal or interference, the bandwidth can be adjusted to 5.5 Mbps, 2 Mbps and 1 Mbps. The automatic adjustment of bandwidth effectively guarantees the stability and reliability of the network. so
The official name of WIFI (Wireless Compatibility Certification) is "IEEE802.11b". Like Bluetooth, Wi-Fi is the same short-range wireless technology used in offices and homes. Although the technology is worse than Bluetooth in terms of data security, it is slightly better in terms of radio coverage. Wi-Fi coverage is about 300 feet (about 90 meters), and needless to say, offices can be used in smaller buildings. so
WIFI is a technology that can wirelessly connect personal computers, handheld devices (such as PDAs, mobile phones) and other terminals. Wi-Fi is a wireless network communication technology brand under the Wi-Fi Alliance (Wi-Fi Alliance). The purpose is to improve the interoperability between wireless network products based on the IEEE 802.11 standard. Currently, people often confuse Wi-Fi with IEEE 802.11. It even equates Wi-Fi with wireless international networking.
WIFI is included in the wireless local area network, the power of the transmitted signal is different, and the coverage is different
In fact, WIFI is a trademark of WLANA (Wireless Local Area Network Alliance). This trademark only guarantees that products using this trademark can cooperate with each other, and has nothing to do with the standard itself. However, because WIFI mainly uses the 802.11b protocol, people gradually get used to it. The 802.11b protocol is called WIFI. In terms of inclusion, WIFI is a standard of WLAN. WIFI is included in WLAN and belongs to a new technology in the WLAN protocol. The coverage of WiFi can reach about 300 feet (about 90 meters), and the maximum WLAN (plus antenna) can reach 5KM.
Covered wireless signal range is different
WIFI (Wireless Fidelity), also known as 802.11b standard, its biggest advantage is that the transmission speed is high, which can reach 11Mbps, and its effective distance is also very long, and it is also compatible with various existing 802.11DSSS devices. Wireless Internet access has become a reality. The coverage of radio waves is wide. The coverage of radio waves based on Bluetooth technology is very small, with a radius of only about 50 feet or about 15 meters, while the radius of Wi-Fi can reach about 300 feet or about 90 meters. However, with the development of wifi technology, the coverage of wifi signal will be wider in the future.
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