802.11n operates on both 2.4GHz and 5GHz, as well as supporting multi-channel usage. IEEE 802.11n: Introduced in 2009, this version had slow initial adoption.This resulted in the widespread adoption of the standard. IEEE 802.11g: Designed in 2003, the 802.11g standard upped the maximum data rate to 54Mbps while retaining use of the reliable 2.4GHz band.802.11b was the standard that kick-started Wi-Fi's popularity. IEEE 802.11b: Also created in 1999, this standard uses the more typical 2.4GHz band and can achieve a maximum speed of 11Mbps.However, the 5GHz frequency has more difficulty with objects in the signal's path, so the range is often poor. 802.11a is fairly quick, too, with maximum data rates topping out at 54Mbps. This was done with the hope of encountering less interference since many devices (like most wireless phones) also use the 2.4GHz band. IEEE 802.11a: Created in 1999, this version of Wi-Fi works on the 5GHz band.Devices using this haven't been made for over a decade and won't work with today's equipment. IEEE 802.11: The original! This now-defunct standard was created in 1997 and supported a blazing fast maximum connection speed of 54 megabits per second (Mbps).Here is a brief history of Wi-Fi standards and whether the standard is still active. Not all old Wi-Fi standards are obsolete.
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