Which value is the max channel width of the 802.11n protocol?

The correct answer is B. 40 MHz. 802.11n (Wi-Fi 4) supports two channel widths: 20 MHz and 40 MHz. The 40 MHz option is achieved by bonding two adjacent 20 MHz channels, doubling throughput compared to 20 MHz alone. Subsequent standards expanded this further - 802.11ac (Wi-Fi 5) added 80 MHz and 160 MHz…

Wireless Infrastructure

Question

Options

A20 MHz
B40 MHz
C60 MHz
D80 MHz

How the community answered

(54 responses)

B
94% (51)
C
2% (1)
D
4% (2)

Explanation

802.11n (Wi-Fi 4) supports two channel widths: 20 MHz and 40 MHz. The 40 MHz option is achieved by bonding two adjacent 20 MHz channels, doubling throughput compared to 20 MHz alone. Subsequent standards expanded this further - 802.11ac (Wi-Fi 5) added 80 MHz and 160 MHz channel widths. Options C (60 MHz) and D (80 MHz) are not valid for 802.11n.

Topics

#802.11n#channel width#40 MHz bonding#channel bonding

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