What is IEEE 802.11

IEEE802.11 is the United States Institute of Electrical and Electronic Engineers (IEEE) to solve wireless network equipment interconnection, in June 1997 to develop the release of the Wireless LAN standards.

802.11 is the IEEE developed the first wireless LAN standards, mainly for the Office LAN and campus network users and user terminals wireless access, business is limited to data access, the highest rate can only reach 2mbit/s. Because of its speed and transmission distance can not meet the needs of people, therefore, the IEEE group has launched a 802.11b and 802.11a two new standards, the former has become the mainstream standard, the latter is also a lot of manufacturers bullish.

IEEE802.11A is the wireless local Area network protocol standard introduced by the American Institute of Electrical and Electronic Engineers (IEEE) to improve its initial wireless standard IEEE802.11. is a useful supplement to IEEE802.11.

802.11A Standard is in the office, family, hotels, airports and many other occasions have been widely used in the 802.11B (transmission speed 11m/s) wireless LAN standard follow-up standards. 802.11A standard transmission is the advantage of fast transmission speed up to 54Mbps, fully meet the voice, data, images and other business needs. The disadvantage is that it cannot be compatible with 802.11B, causing some wireless network devices that have already purchased 802.11B standards to be unavailable in the new 802.11A network. When purchasing a device, it is important to support a protocol standard between different devices.

802.11A features with a higher frequency width, applicable to the processing of a large number of data, such as audio-visual information transmission, or the use of the expansion of the public wireless transmission services are of course the main choice, but for the general Internet users, the use of 802.11b system is sufficient speed, coupled with its popular price is more attractive , consumers can decide which goods they should buy according to their own needs and budgets.

IEEE802.11B is the second generation of wireless local Area network protocol standards introduced by the American Institute of Electrical and Electronic Engineers (IEEE) to improve its initial wireless standard IEEE802.11.

In order to solve the problem of interconnection of wireless network equipment, the American Institute of Electrical Engineers (IEEE) has introduced the IEEE802.11 Wireless protocol annotation. At present 802.11 main has 802.11b, 802.11a, 802.11g three standard. The first launch is 802.11B, its transmission speed is 11mb/s, because its connection speed is relatively low, then introduced the 802.11A standard, its connection speed can reach 54mb/s. But since the two are not compatible, some wireless network devices that have already purchased 802.11B standards are not available in the new 802.11A network. As a result, IEEE has officially introduced the 802.11G standard, which is fully compatible with the 802.11B standard and is compatible with the 802.11a rate, so that the original 802.11b and 802.11a two standard devices can be used on the same network through 802.11g.

ieee802.11g, like 802.11b, also works in the 2.4GHz band (a range of wireless working frequencies, if we use a mobile phone that must work within a certain frequency range), than The universal 802.11b speed is now 5 times times faster and is fully compatible with 802.11, and it is recommended to determine whether or not to support the protocol standard when choosing a device.