GCFA · Question #158
Which of the following wireless network standards operates on the 5 GHz band and transfers data at a rate of 54 Mbps?
The correct answer is A. 802.11a. The 802.11a standard operates exclusively on the 5 GHz frequency band and provides a maximum data transfer rate of 54 Mbps.
Question
Which of the following wireless network standards operates on the 5 GHz band and transfers data at a rate of 54 Mbps?
Options
- A802.11a
- B802.11u
- C802.11g
- D802.11b
How the community answered
(55 responses)- A73% (40)
- B15% (8)
- C9% (5)
- D4% (2)
Why each option
The 802.11a standard operates exclusively on the 5 GHz frequency band and provides a maximum data transfer rate of 54 Mbps.
802.11a was ratified in 1999 and uses OFDM modulation on the 5 GHz band, achieving a maximum throughput of 54 Mbps. Because 5 GHz was less congested than 2.4 GHz at the time, it offered less interference, though at reduced range compared to 2.4 GHz standards.
802.11u is not a speed/frequency standard - it defines interworking with external networks and is the basis for Hotspot 2.0 (Passpoint).
802.11g also achieves 54 Mbps but operates on the 2.4 GHz band, not 5 GHz.
802.11b operates on the 2.4 GHz band and has a maximum data rate of only 11 Mbps.
Concept tested: IEEE 802.11a wireless standard frequency and speed
Source: https://www.cisco.com/c/en/us/td/docs/wireless/technology/wireless_lan/guide/wireless_lan.html
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