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Exam CWNA-107 topic 1 question 24 discussion

Actual exam question from CWNP's CWNA-107
Question #: 24
Topic #: 1
[All CWNA-107 Questions]

You manage a WLAN with 100 802.11ac access points. All access points are configured to use 80 MHz channels. In a particular BSS, only 40 MHz communications are seen. What is the likely cause of this behavior?

  • A. The short guard interval is also enabled.
  • B. The clients are all 802.11n STAs or lower
  • C. The AP is improperly configured to use only 40 MHz of the 80 MHz allocated bandwidth
  • D. All clients implement single spatial stream radios
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Suggested Answer: C 🗳️
by Coolbreeze at Oct. 24, 2019, 6:54 p.m.

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Coolbreeze
Highly Voted 5 years, 1 month ago
While most 802.11n and 802.11ac clients support 40 MHz channels, not all 802.11ac clients support 80MHz channels, and no 802.11n clients can support it. I believe the correct answer is B. (https://7signal.com/802-11ac-migration-part-2-whats-nobodys-telling-you-about-80mhz-and-160mhz-channel-bonding/)
upvoted 6 times
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KevinHeaven
Most Recent 4 years, 3 months ago
802.11n can support up to 40MHz
upvoted 1 times
KevinHeaven
4 years, 3 months ago
Hence the answer is B
upvoted 4 times
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