Which wireless standard operates in the 5 gigahertz (GHz) frequency band?

The wireless standard that operates in the 5 gigahertz (GHz) frequency band is 802.11a. This standard was developed specifically for high-speed wireless networking and it utilizes the 5 GHz band to provide better performance and less interference compared to the lower frequency bands.

While 802.11n can also operate in both the 2.4 GHz and 5 GHz bands, it is not exclusively defined by the 5 GHz role. However, 802.11a is uniquely positioned in this regard, as it strictly operates in the 5 GHz range, allowing for higher data rates and less crowding from other wireless devices, which typically use the 2.4 GHz band.

The standards 802.11b and 802.11g primarily operate in the 2.4 GHz band, focusing on compatibility and range over speed in comparison to the advantages offered by 802.11a. Knowing the specifics of these standards helps in selecting the appropriate wireless technology based on environmental conditions and requirements for data transmission speed.