Definition: 802.11g was ratified in 2003 as the latest in the series of IEEE 802.11 standards for wireless LAN (WLAN) communications. 802.11g extends and improves on the earlier 802.11b standard.
802.11g supports a maximum bandwidth of 54 Mbps compared to the 11 Mbps of 802.11b. To achieve backward compatibility, 802.11g uses the same communication frequency range – 2.4 Ghz – as 802.11b. As with the other 802.11 standards, 802.11g supports Ethernet networking exclusively.