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wireless standards

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I am looking for as much info on wirless standards here are some questions I have come up with if you have more info on this topic it would be appreciated.
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This job highlights wireless standards.

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<br>Business and home networkers wanting to build a wireless local area network (WLAN) are bombarded with a number of products that conform to different wireless standards such as 802.11a, 802.11b, 802.11g, Bluetooth, etc. Here is a brief summary of the evolution and the merits and de-merits of each of these standards.
<br>In 1997, the Institute of Electrical and Electronics Engineers (IEEE), through their Standard working group created the first WLAN standard called 802.11, named after the group. This standard only supported a maximum bandwidth of 2 Megabits per second (Mbps). Since this is very slow for most of the applications, it is no longer being used. It is replaced by the subsequent three enhanced versions of this standard.
<br>In July 1999, IEEE came up with the 802.11b specification. 802.11b supports bandwidth up to 11 Mbps and signals in an "unregulated frequency" of 2.4 GHz. Since this frequency is in the same range as other home appliances such as cordless phones and microwave ovens, interference is a common problem if used too close to these appliances. ...

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