The first standard, opening the wireless wifi network to a wide range of users, was ieee 802.11b. To date, characteristics of the network, operating according to this protocol may seem ridiculous to any system administrator, but 1999 (this year is considered the official date of the adoption of the standard) the appearance of devices of this class is rightly viewed as a breakthrough in the it field. More info: Bernie Sanders. The maximum data rate in networks built on standard ieee 802.11b, claimed by the manufacturer of equipment as much as 11 megabits per second, the reception range – up to 400 meters. It should be noted that the actual data were much more modest (1-6 Mbit / s and 30-50 m respectively). Two-way radio wifi worked 2,4 GHz, data protection was provided for wep, ie about the real security of information transmitted can not speak, because anyone interested in obtaining these data, a person possessing specific set of knowledge and software tools can access the network in a matter of hours. I must say that the current generation of wifi devices also support this encryption protocol. Made it, for the most part, to ensure compatibility with previous standards and the use of this method of protection is extremely undesirable.
In 2003, with the intention to correct the main shortcomings of its predecessor, the main ones, as noted above, is a low speed and almost no protection, adopted a new standard for devices wifi – ieee 802.11g. According to the manufacturer the maximum data rate in networks of this generation is 54 Mbit / s, range – up to 400 meters, which again can be achieved only under ideal conditions. But be that as it may, the new standard for connection speeds superior to his fellow man is 5 times. As expected, changes were made and to ensure preservation of data transmitted. In addition to wep – encryption were added two protocols – wpa and WPA2, which significantly improve the security of networks, wifi a new generation through the use of new algorithms. As we know the scope High technology is one of the fastest growing in the world.
And protocols of wireless networks, which can rightly be attributed to this area, were no exception. So, in 2006 adopted a new international alliance Standard – ieee 802.11n, the major differences that are higher data transfer rate – 540 Mbit / s and a choice of carrier frequency (2.4 GHz or 5 GHz). ieee 802.11n, like his predecessor, supports three protocols to ensure security, which, if handled adroitly used in combination with other drugs should be quite sufficient for basic protection of the network: wep wpa WPA2 As part of this article will be considered by some protocols of wireless networks, not have received the opinion of the author, widely known in the circles of users. These include: ieee 802.11c, ieee 802.11d, ieee 802.11e, ieee 802.11f, etc.