What does a WLAN mean? What is the difference between WLAN and WiFi?

First we introduce WLAN wireless Internet, its full name is: Wireless Local area Networks, the Chinese explanation is: Wireless LAN, is one kind utilizes the radio frequency (Radio Frequency RF) technology to carry on the transmission system, This technology is not used to replace the cable local area network, but to make up for the shortage of wired local area network, in order to reach the goal of network extension, so that wireless local area network can use a simple access architecture to enable users through it, without network cable, no distance restrictions of the unobstructed networks. WLANs use the ISM (Industrial, Scientific, medical) radio broadcast band to communicate. The 802.11A standard for WLANs uses the 5 GHz band to support the maximum speed of Mbps, while the 802.11B and 802.11g standards use the 2.4 GHz band to support the maximum Mbps and Mbps speeds respectively. At present, WLAN contains protocol standards: IEEE802.11B protocol, IEEE802.11A protocol, ieee802.11g protocol, IEEE802.11E protocol, ieee802.11i protocol, Wireless Application Protocol (WAP).

Below is a description of WiFi wireless internet access,WiFi (wirelessfidelity, wireless fidelity) Technology is an IEEE 802 based. The 11-Series standard wireless network communication technology brand is designed to improve interoperability between IEEE 802.11-compliant wireless networking products, held by Wi-Fi Federation (Wi-Fi Alliance), and simply WiFi is a wireless networking technology that used to connect computers over the internet, And now it is through radio waves to connect the net. And Wi-Fi Alliance (also known as: Wireless LAN Standardization Organization WECA) was founded in 1999, when the name is called Wireless Ethernet Compatibility Alliance (WECA), in October 2002, officially renamed Wi-Fi Alliance. As with Bluetooth technology, it belongs to the short-range wireless technology used in office and home. The technology used to make 2.4GHz near the band, the band is currently not a licensed wireless band. There are currently two standards available, namely ieee802.11a and ieee802.11b. In the case of weak signal or interference, the bandwidth can be adjusted to 5.5Mbps, 2Mbps and 1Mbps, automatic bandwidth adjustment, effectively guarantee the stability and reliability of the network. The technology has its own advantages, so it is favored by manufacturers.

By using the above basic introduction to WLAN and WiFi, we can see that WLAN is roughly different from WiFi, edited as follows:

　　the difference between WLAN and WiFi one:WiFi is included in the WLAN, the power of transmitting signal is different, the coverage range is different

In fact, WiFi is a trademark of the Wlana (Wireless LAN Alliance), which only guarantees that the goods using the trademark can co-operate with each other, not in fact related to the standard itself, but because WiFi The main use of the 802.11B protocol, so people are becoming accustomed to using WiFi to address the 802.11B protocol. In terms of inclusion, WiFi is a standard for WLANs, which are included in WLANs and belong to a new technology in WLAN protocols. WiFi coverage of up to 300 feet (about 90 meters), the largest WLAN (plus antenna) can reach 5KM.

　　WiFi and WLAN difference two: the coverage of wireless signal range is different

WIFI (Wireless Fidelity), also known as the 802.11B Standard, its biggest advantage is the high transmission speed, can reach 11Mbps, in addition to its effective distance is also very long, but also with the various 802.11DSSS equipment compatible. Wireless internet has become a reality. Radio waves cover a wide range of Bluetooth technology based radio coverage is very small, the radius of about 50 feet about 15 meters, and Wi-Fi radius of up to 300 feet about 90 meters, the office from needless to say, is in the whole building can also be used. But with the development of WiFi technology, the future coverage of WiFi signals will be wider.

Introduction Here I believe you should have some understanding of the difference between WiFi and WLAN, for most friends we know WiFi and WLAN are the technology to achieve wireless internet, and WLAN wireless Internet access actually includes WiFi wireless internet access, WLAN wireless Internet coverage is wider, and WiFi wireless internet is more suitable for such as smart phones, tablets and other intelligent small digital products.