Editing IEEE 802.11 (section)

===802.11g===
{{Main|IEEE 802.11g-2003}}

In June 2003, a third modulation standard was ratified: 802.11g. This works in the 2.4&nbsp;GHz band (like 802.11b), but uses the same [[OFDM]] based transmission scheme as 802.11a. It operates at a maximum physical layer bit rate of 54&nbsp;Mbit/s exclusive of forward error correction codes, or about 22&nbsp;Mbit/s average throughput.<ref name="wndw-pdf">{{cite book|title=Wireless Networking in the Developing World: A practical guide to planning and building low-cost telecommunications infrastructure|publisher=Hacker Friendly LLC|edition=2nd|page=425|year=2007|url=http://wndw.net/pdf/wndw2-en/wndw2-ebook.pdf|url-status=dead|archive-url=https://web.archive.org/web/20081006075431/http://www.wndw.net/pdf/wndw2-en/wndw2-ebook.pdf|archive-date=6 October 2008|access-date=13 March 2009}} page 14</ref> 802.11g hardware is fully backward compatible with 802.11b hardware, and therefore is encumbered with legacy issues that reduce throughput by ~21% when compared to 802.11a.{{citation needed|date=February 2023}}

The then-proposed 802.11g standard was rapidly adopted in the market starting in January 2003, well before ratification, due to the desire for higher data rates as well as reductions in manufacturing costs. {{Citation needed|date=April 2021}} By summer 2003, most dual-band 802.11a/b products became dual-band/tri-mode, supporting a and b/g in a single mobile [[adapter card]] or access point. Details of making b and g work well together occupied much of the lingering technical process; in an 802.11g network, however, the activity of an 802.11b participant will reduce the data rate of the overall 802.11g network.

Like 802.11b, 802.11g devices also suffer interference from other products operating in the 2.4&nbsp;GHz band, for example, wireless keyboards.