Description of 802.11g standard that works on 2.4 GHz.

802.11g was released in June 2003. It works on frequency of 2.4 GHz, but its maximum bandwidth is 54Mbps. Hardware is compatible with 802.11b hardware.

11g uses OFDM - Orthogonal Frequency-Division Multiplexing for 54, 48, 36, 24, 18, 12, 9, 6 Mbps. For 11 and 5.5 Mbps it uses CCK and DSSS (like 802.11b). This enables compatibility with 802.11b.

So now we have a standard that keeps all good side of lower 2.4 GHz frequency, like bigger range, lower cost. It has a bandwidth 54 Mbps like 802.11a.