220-801 · Question #811
Which of the following WLAN protocols is in the 5GHz band with a MAXIMUM data rate of 54Mbps?
The correct answer is A. 802.11a. IEEE 802.11a is the WLAN standard that operates exclusively in the 5GHz frequency band and supports a maximum data rate of 54Mbps.
Question
Which of the following WLAN protocols is in the 5GHz band with a MAXIMUM data rate of 54Mbps?
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(22 responses)- A86% (19)
- B9% (2)
- C5% (1)
Why each option
IEEE 802.11a is the WLAN standard that operates exclusively in the 5GHz frequency band and supports a maximum data rate of 54Mbps.
802.11a was ratified in 1999 alongside 802.11b and uses OFDM (Orthogonal Frequency Division Multiplexing) in the 5GHz band to achieve a maximum theoretical throughput of 54Mbps. Its use of 5GHz reduces interference from 2.4GHz devices but results in shorter range.
802.11b operates in the 2.4GHz band and has a maximum data rate of only 11Mbps using DSSS modulation.
802.11g also operates in the 2.4GHz band and achieves 54Mbps, matching 802.11a in speed but not in frequency band.
802.11n is a dual-band standard supporting both 2.4GHz and 5GHz and achieves a maximum theoretical data rate of up to 600Mbps using MIMO technology.
Concept tested: 802.11a WLAN standard frequency and data rate
Source: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/68583-understand-802-11-std.html
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