Which IEEE wireless standard utilizes the 5 GHz frequency band for its signal transmissions?

Which IEEE wireless standard utilizes the 5 GHz frequency band for its signal transmissions?

• A. 802.11n
• B. 802.11b
• C. 802.11g
• D. 802.11a

Answer: (A)

Frequency bands determine where the wireless signal travels. The 5 GHz spectrum is the domain for standards designed to use that higher band. The standard introduced to operate in 5 GHz is 802.11a, which uses the UNII channels in that band to deliver higher throughput than earlier 2.4 GHz-only designs. The other options mostly use 2.4 GHz; 802.11b and 802.11g are 2.4 GHz-only, and 802.11n can operate in either 2.4 GHz or 5 GHz (dual-band) but is not restricted to 5 GHz. So the one that utilizes the 5 GHz frequency band for its transmissions is 802.11a.

Frequency bands determine where the wireless signal travels. The 5 GHz spectrum is the domain for standards designed to use that higher band. The standard introduced to operate in 5 GHz is 802.11a, which uses the UNII channels in that band to deliver higher throughput than earlier 2.4 GHz-only designs. The other options mostly use 2.4 GHz; 802.11b and 802.11g are 2.4 GHz-only, and 802.11n can operate in either 2.4 GHz or 5 GHz (dual-band) but is not restricted to 5 GHz. So the one that utilizes the 5 GHz frequency band for its transmissions is 802.11a.