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802.11a and 802.11g use different frequencies so why is their top speed, 54 Mbps, the same?

802.11a and 802.11g use different frequencies so why is their top speed, 54 Mbps, the same?
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mc87
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mc87
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
you are correct

802.11a uses 5GHz Band
802.11b/g uses 2.4GHz Band

Higher frequencies do not travel as far as lower frequencies. So 802.11a range is less than 802.11b/g.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
802.11g was copied from 802.11a, so the top data rates are exactly the same.

the modulation scheme used in 802.11g is orthogonal frequency-division multiplexing (OFDM) which was developed  from 802.11a with data rates of 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s.

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Jakob DigranesSenior ConsultantCommented:
Hanccocka is spot on.
They use same modulation technique - but in different frequency areas
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QlemoC++ DeveloperCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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