N10-005 · Question #307
Which of the following standards can operate at 40MHz channel spacing?
The correct answer is D. 802.11n. 802.11n introduced 40MHz channel bonding, doubling the channel width used by earlier standards.
Question
Which of the following standards can operate at 40MHz channel spacing?
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(26 responses)- B4% (1)
- C8% (2)
- D88% (23)
Why each option
802.11n introduced 40MHz channel bonding, doubling the channel width used by earlier standards.
802.11a uses 20MHz channel spacing and does not support 40MHz bonding.
802.11b uses 20MHz channel spacing and does not support 40MHz bonding.
802.11g uses 20MHz channel spacing and does not support 40MHz bonding.
802.11n supports both 20MHz and 40MHz channel widths through a feature called channel bonding, which combines two adjacent 20MHz channels into a single 40MHz channel. This wider channel allows for significantly higher throughput. Earlier standards were limited to 20MHz channels only.
Concept tested: 802.11n 40MHz channel bonding
Source: https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/67956-trouble-802-11n.html
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