What is the difference between WLAN and WiFi?

Source: Internet
Author: User

What is the difference between WLAN and WiFi? What is a WLAN? What is WiFi? There may be a lot of children's shoes do not know their differences, here to give you a detailed introduction of the WLAN and WiFi differences. Hope to help everyone!

Let's start with a brief introduction to WLAN wireless Internet access:

The full name is: Wirelesslocalareanetworks, the Chinese explanation is: The wireless local area network, is one kind utilizes the radio frequency (RADIOFREQUENCYRF) technology to carry on the transmission system, this technology's appearance is not to replace the wired local area network, It is used to make up the shortage of the wired local area network to reach the goal of the network extension, so that the wireless local area network can make use of the simple access architecture to enable the user to realize the unobstructed network without the network cable and without the distance restriction. WLANs use the ISM (Industrial, scientific, medical) radio broadcast band to communicate. WLAN 802.11a Standard uses 5GHz band, the maximum speed is 54Mbps, and 802.11b and 802.11g standard use 2.4GHz band, respectively support the maximum 11Mbps and 54Mbps speed. 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).

Let's introduce the WiFi wireless internet

What does it mean to use WiFi to make a simple introduction, WiFi (wirelessfidelity, wireless fidelity) technology is based on The IEEE802.11 series of standard wireless network communication technologies is designed to improve interoperability between wireless network products based on IEEE802.11 standards, held by Wi-Fi Federation (Wi-fialliance), and simply WiFi is a wireless networking technology, Previously connected to the computer through the network, but now it is through radio waves to connect the network. And Wi-Fi Alliance (also known as: Wireless LAN Standardization Organization WECA) was founded in 1999, when the name is called Wirelessethernetcompatibilityalliance (WECA), in October 2002, officially renamed Wi- Fialliance.

As with Bluetooth technology, WiFi is part of the short-range wireless technology used in offices and homes. 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. Because of its own advantages, the technology is favored by manufacturers (WWW.023DN.COM).

WLAN and WiFi

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 WiFi and WLAN 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 one another, and that the standard itself does not actually matter, But because WiFi mainly uses 802.11B protocol, 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 (wirelessfidelity), 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 know the difference between WiFi and WLAN, for most friends we know WiFi and WLAN are the technology to achieve wireless Internet access, 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.

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