Standard of 802.11g
802.11gIn 2002 and 2003, WLAN products supporting a newer standard called 802.11g emerged on the market. 802.11g attempts to combine the best of both 802.11a and 802.11b. 802.11g supports bandwidth up to 54 Mbps, and it uses the 2.4 Ghz frequency for greater range. 802.11g is backwards compatible with 802.11b, meaning that 802.11g access points will work with 802.11b wireless network adapters and vice versa.
The 802.11g standard for wireless networking supports a maximum bandwidth of 54 Megabits per second (Mbps).
802.11g and other Wi-Fi network protocols include a feature called dynamic rate scaling. If the wireless signal between two connected Wi-Fi devices is not strong enough, the connection cannot support a maximum speed of 54 Mbps. Instead, the Wi-Fi protocol reduces its maximum transmission speed to a lower number to maintain the connection.
It is fairly common for 802.11g connections to run at 36 Mbps, 24 Mbps, or even lower. When dynamically set, these values become the new theoretical maximum speeds for that connection (which are also even lower in practice due to the Wi-Fi protocol overhead described above).
Pros of 802.11g - fast maximum speed; signal range is good and not easily obstructedCons of 802.11g - costs more than 802.11b; appliances may interfere on the unregulated signal frequency
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