The 802.11 set first appeared in the year 1990’s and which was later developed by the Institute of Electrical and Electronics Engineers. This is now available and been extended to be one of the leading technologies in the world of wireless.


802.11
With the use of either FHSS (frequency hopping spread spectrum) or DSSS (direct sequence spread spectrum) this will provide a 1 to 2 Mbps speed for the transmission rate on the 2.4GHz band.

802.11a
Using the OFDM (orthogonal frequency division multiplexing) can also provide the user with a 54Mbps speed and can run on the 5GHz band.

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802.11b
This is set is also known as a Wi-Fi or High Rate 802.11, uses DSSS and can apply to wireless LANs. This is the most commonly used for the private use, at home. This will provide you with a speed of 11 Mbps transmission rate that has a fallback rate of 5.5, 2 and 1 Mbps.

802.11g
This can also provide you with a 20+ Mbps transmission rate, and can applicable to LANs and runs on the 2.4GHz band.

The image shown below will demonstrates the wireless data infrastructure as an extension of the Internet.