802.11 is a family of standards that are behind wireless networks. 802.11g transfers data at speeds of up to 54Mbps (million bits per second), compared with only 11Mbps of the earlier 802.11b standard. Networks employing 802.11g operate at radio frequencies between 2.400 GHz and 2.4835 GHz, the same band as 802.11b, but the 802.11g specification employs orthogonal frequency division multiplexing (OFDM) to obtain higher data speed. Computers set up for 802.11g can fall back to speeds of 11 Mbps.