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 Post subject: Why the four speeds of 802.11b hardware?
 Post Posted: Sun Oct 26, 2008 6:57 pm 
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Joined: Sun Feb 04, 2007 1:32 pm
Posts: 225
I was reading your book Upgrading and Repairing PCs, and in the LAN chapter,
you talk about 802.11b hardware being designed for the four speeds (11, 5.5,
2, 1 Mbps), and I was just wondering why that is? Why these four speeds?


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 Post subject: Re: Why the four speeds of 802.11b hardware?
 Post Posted: Sun Oct 26, 2008 6:58 pm 
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Joined: Sun Feb 04, 2007 11:44 am
Posts: 5803
Most forms of digital wireless communication operate at several speeds. There
is the advertised (full) speed, which is used if the connection between
devices is at or near full strength and without noise or interference. Then
there are usually several slower "fall-back" speeds, which are utilized when
the signal quality is such that full speed cannot be used without errors. As
signal quality is reduced, slower fall-back speeds are chosen. Scott.


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