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Assume that your network operates in a regulatory domain that allows use of the entire 5 GHz space allowed in the 802.11ac amendment. In your
upcoming
802.11ac deployment, you would like to take advantage of the performance improvements that result from channel bonding. However, after
extensive testing, you have determined that your mission-critical WLAN should not use channels requiring DFS support.
Given those two criteria (enable channel bonding and disable DFS channels), in the 5 GHz spectrum, how many non-overlapping 40 MHz channels
will your system be able to use?
Suggested Answer: C
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12 comments · newest first
LE
Leonida
1 month ago
I agree with Tamesha. Two channels might limit performance too much.
AD
Adela
1 month ago
I think it's C. Four channels could work without DFS.
TA
Tamesha
1 month ago
I'm leaning towards option B. Three channels seem reasonable.
LE
Lenna
2 months ago
Definitely 3, no DFS means fewer options.
KR
Kristel
2 months ago
I thought it was 4 channels, but I guess not.
WE
Werner
2 months ago
Wait, are we sure about that? Seems low for 5 GHz.
CE
Cecilia
2 months ago
Totally agree, 3 is the right answer!
JE
Jeniffer
2 months ago
You can use 3 non-overlapping 40 MHz channels.
ME
Melita
2 months ago
I feel like the answer might be 3, but I need to double-check how DFS restrictions affect the channel count.
SH
Sheridan
3 months ago
If I remember correctly, there are a few non-overlapping channels in the 5 GHz range, but I can't quite recall the exact number.
DO
Dominic
3 months ago
I think we practiced a similar question, and I recall that there are a limited number of channels available when avoiding DFS.
GL
Glen
3 months ago
I remember studying that in the 5 GHz band, we can use 40 MHz channels, but I’m not sure how many are non-overlapping without DFS.