220-801 · Question #171
Which of the following wireless standards operates at 5 GHz and has a maximum speed of 54 Mbps?
The correct answer is A. 802.11a. 802.11a operates exclusively in the 5 GHz frequency band with a maximum theoretical throughput of 54 Mbps. It was actually released around the same time as 802.11b but was less commercially adopted due to shorter range and higher equipment costs. 802.11b operates at 2.4 GHz…
Question
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(22 responses)- A91% (20)
- C5% (1)
- D5% (1)
Explanation
802.11a operates exclusively in the 5 GHz frequency band with a maximum theoretical throughput of 54 Mbps. It was actually released around the same time as 802.11b but was less commercially adopted due to shorter range and higher equipment costs. 802.11b operates at 2.4 GHz with a max speed of 11 Mbps. 802.11g operates at 2.4 GHz with a max speed of 54 Mbps - same speed as 802.11a but different frequency. 802.11n (Wi-Fi 4) operates on both 2.4 GHz and 5 GHz with speeds up to 600 Mbps. The combination of 5 GHz + 54 Mbps is the unique fingerprint of 802.11a.
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