802.11a versus 802.11g?

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Tags:
802.11
802.11 networking equipment
802.11g
Wireless
Wireless PC cards
Wireless standards
I have heard that 802.11a and 802.11g have the same capacity – so can I buy cheap older cards and still obtain the same speeds? Is there a downside to using 802.11a?

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Not many people use it, and it isn’t backwards compatible with N.

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  • ITKE
    [...] 1. Mr. Denny weighed in: 802.11a versus 802.11g. [...]
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  • Labnuke99
    802.11A operates on the 5GHz spectrum (54Mb/s max). 802.11B (11Mb/s) / 802.11G (54Mb/s) operate at 2.4GHz spectrum. 802.11A is NOT compatible with 802.11B/G. So, not all wi-fi protocols are backwards compatible. 802.11N operates in both the 5GHz and 2.4GHz spectrum but is only compatible with 802.11G. For more information see the Wikipedia article on 802.11.
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