Table of contentsWLAN IEEE802.11….

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………………………………………………………..4802.11g……………………………………………………………………………………………………………………………..5802.11n……………………………………………………………………………………………………………………………..6References……………………………………………………………………………………………………………………………………….7                IEEE 802.11Definition :”WirelessLANs or WLANs communicate that is define by the set of standards(IEEE 802.11 )`.The technology used in 802.11 is branded to consumers as Wi-Fi.””Accordingto the name , IEEE 802.11 is overseen by the IEEE, specifically the IEEELAN/MAN Standards Committee (IEEE 802). The current version now in use is of802.11-2007.                    Actually,there are technical steps for implementing Wi-Fi used by IEEE 802.11. Sellingproducts under this trademark is checked by an industry trade association namedas Wi-Fi Alliance.””TheU.S decide that IEEE 802.11 standards have its roots from a year 1985. FederalCommission for Communication that opened up the ISM band which has no licenseuse. It was formally released in 1997. IEEE 802.11-1997 is a original standard.”                               “”802.11 standards” or the “802.11 family of standards” are commonlyused. However to be more precise ,now this time only one standard existing is(IEEE 802.11-2007) but many changes commonly known as amendments include802.11a ,802.11b, 802.11g, and 802.11n.””This LinksysWRT54GS Wi-Fi router from 2005 works on the 2.4 GHz “G” standard,is able to transmit 54 megabits per second.”” The Netgeardual-band router from 2013 uses the AC standard, is able to transmit 1900megabits per second.” Brief Description:”The 802.11 family consistsof a series of half-duplex over-the-air modulation techniques that use the same basicprotocol. The first wireless networking standard in the family was 802.11-1997, but on market 802.11b was the first time widely accepted, supported by802.11a, 802.11g, 802.11n, and 802.11ac. Other standards (c–f, h, j) areservice changes that are used to extend the idea of the existing standard.””802.11b and 802.11g bothuse the 2.4 GHz ISM band ,nowit is operating in the United States under Part 15 of the U.S. FederalCommunications Commission Rules and Regulations. By using  this choice of frequency band, 802.11b and gequipment and this suffering occasionally  interference of microwave ovens, cordless telephones and Bluetooth devices. 802.11b and 802.11g able tocontrol their interference and interference by using direct-sequencespread spectrum and  OFDM signaling methods. 802.11a uses the 5 GHzU-NII band,For greater part of the world, offers at least 23 not able to interact withchannels instead of the 2.4 GHz ISM frequency band offering only three notable to interact channels, where other types of adjacent channels interact. Thefrequencies  with worst or better performanceare  higher or lower may be realized,depending on the environment. 802.11n can use either the 2.4 GHz or the5 GHz band; 802.11ac5  use GHz band only.” WirelessStandards 802.11a, 802.11b/g/n:”802.11a is the first Wi-Fi wireless network communication standards which is created in the IEEE 802.11 standards family.”History:”The specification of 802.11a was signed(ratified) in1999. At that time, the only other Wi-Fi technology was being able toready for the market were 802.11b. (The original 802.11 did not gain widespreaddeployment due to its very  slow speed.)802.11a and these other standards were incompatible, meaning that 802.11adevices cannot interact  with the otherforms and vice versa.””A maximum bandwidth of 54 Mbps is supported by an 802.11a wireless network ,significantly  better than the 11 Mbps of802.11b and on par with what 802.11g would start to offer a few yearslater. The 802.11a is an attractive technology due to its specifications, butits performance is obtained by using relatively higher cost hardware.”802.11aand Wireless Signaling:”In the 1980s for public use U.S. government  opened three specific wireless frequencybands – 900 MHz (0.9 GHz), 2.4 GHz, and 5.8 GHz . 900 MHz provedtoo low of frequency to be useful for data networking, although cordless phones used it.””Wireless spread spectrum radio signals in the 5.8 GHzfrequency range are  transmitted by802.11a. This band was running in the U.S. and for a long time many countries,meaning that 802.11a networks did not have to contend with signal interferencefrom other forms of transmitting devices. 802.11b networks use frequenciesin the often unregulated 2.4 GHz range and were much more susceptible to radiointerference from other devices.”