Which wireless standard can operate at a rate of up to 54 Mbps using a frequency of 5 GHz?

The wireless standard that operates at a rate of up to 54 Mbps using a frequency of 5 GHz is 802.11a. This standard was developed as part of the IEEE 802.11 family and was one of the first to operate in the 5 GHz band, allowing for higher data rates and reduced interference from other devices that typically use the more congested 2.4 GHz band.

802.11a can provide speeds up to 54 Mbps under ideal conditions, making it suitable for applications that require higher bandwidth, such as video streaming and large file transfers. In contrast, other standards such as 802.11b operate at a maximum of 11 Mbps in the 2.4 GHz band, while 802.11g can reach 54 Mbps but is also confined to 2.4 GHz. 802.11n can support much higher speeds than 54 Mbps (up to 600 Mbps theoretically) by using both the 2.4 GHz and 5 GHz bands, but its minimum specification often includes backward compatibility with the 2.4 GHz band rather than being limited to the 5 GHz band like 802.11a.