802.11 HISTORY
The aboriginal 802.11 accepted was accustomed in 1997 and accustomed manual
speeds that topped out at 2 Mbps. This adaptation of the accepted accustomed
two altered methods for encoding advice at a concrete level, Frequency Hopping
Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS). These two
altered encoding schemes are incompatible, however, and the best led to a lot
of abashing in the marketplace.
In 1999, the IEEE appear 802.11b, an alteration to the aboriginal 802.11
standard. The 802.11b accepted acclimated DSSS and added the best manual
acceleration to a abundant faster 11 Mbps. Additionally appear in 1999 was
802.11a, which accustomed 802.11 to run alfresco of the awash 2.4-GHz
industrial, scientific, and medical (ISM) bandage and in the 5-GHz Unlicensed
National Advice Infrastructure (UNII) band. Due to added amount and bargain
arresting propagation, 802.11a was never broadly adopted by consumers admitting
the added acceleration it offered (54 Mbps).
Increasing the acceleration of 802.11 has been a constant antecedence
for the 802.11 committee, so in 2003, they appear addition acceleration boost,
802.11g, which brought 54 Mbps while additionally utilizing the 2.4-GHz band.
The abutting acceleration access is 802.11n, which allows speeds of 100 Mbps.
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