802.11g - definition

The Wi-Fi 3 wireless networking standard, 802.11g, was introduced by the Institute of Electrical and Electronics Engineers (IEEE) in 2003. It provides data transfer speeds of up to 54 Mbps (Megabits per second) and works in the 2.4 GHz frequency spectrum.
With faster speeds, greater range, and more security measures, 802.11g is an advance over 802.11b. It operates in the same frequency spectrum as 802.11b but employs a different modulation strategy that permits faster data transmission rates.
Additionally, 802.11g introduced a few new technologies, including Short Guard Interval (SGI), which shortens the time between data transmissions and enhances performance, and Packet Binary Convolutional Coding (PBCC), an alternative coding scheme that can offer faster data rates under certain circumstances.
Since 802.11g and 802.11b are backward compatible, 802.11g-capable devices can communicate with 802.11b-capable devices. However, in the crowded 2.4 GHz frequency band, it is susceptible to the same interference problems as 802.11b. The 802.11g Wi-Fi standard is no longer widely used since newer ones, such 802.11n and 802.11ac, which provide faster speeds and greater performance, have generally replaced it.