CWNP
PW0-270 · Question #19
Given: Before installing a Wi-Fi network, ABC Company performed a spectrum analysis looking for problems. The 2.4 GHz RF spectrum looked like Image-A. After installing an ERP WLAN, ABC Company…
The correct answer is B. A high-power, narrowband RF interference source on channel 1 is causing the CCA. See the full explanation below for the reasoning.
Question
Given: Before installing a Wi-Fi network, ABC Company performed a spectrum analysis looking for problems. The 2.4 GHz RF spectrum looked like Image-A. After installing an ERP WLAN, ABC Company performed another spectrum analysis during business hours. The 2.4 GHz RF spectrum then looked like Image-B close to an AP on channel 1. Now the 2.4 GHz RF spectrum looks like Image-C and access points and clients can no longer communicate on channel 1. What is happening on channel 1?
Exhibit
Options
- AThe access point's antenna connectors have been tampered with, causing "spike and shear" RF
- BA high-power, narrowband RF interference source on channel 1 is causing the CCA
- CStronger transmissions from licensed 2.4 GHz users, such as HAM operators, are compressing
- DThe shape of the signals in images B and C indicates that a licensed user in this frequency range
- EDetection of a DFS radar event has discontinued 802.11 operation on channel 1, but the access
How the community answered
(36 responses)- A11% (4)
- B78% (28)
- C3% (1)
- D6% (2)
- E3% (1)
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