802.11g is has a higher bandwidthbitrate (54mbs, realisitc 22-26mbs). It used 802.11g uses the same technologyradio-frequency bandwidth as 802.11b, but has to do with the QAM802.11g implements QAM / modulation. So So a 64-QAM modulation would give youincreases the bitrate to 54mbs theoretical speed. It's basically the accuracy of the wlan. How accuratly you can transmit/modulate your signal and how accuratly the client can receive and process the signal.