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CWNP Exam CWAP-404 Topic 2 Question 26 Discussion

Actual exam question for CWNP's CWAP-404 exam
Question #: 26
Topic #: 2
[All CWAP-404 Questions]

A manufacturing facility has installed a new automation system which incorporates an 802.11 wireless network. The automation system is controlled from tablet computers connected via the WLAN. However, the automation system has not gone live due to problem with the tablets connecting to the WLAN. The WLAN vendor has been onsite to perform a survey and confirmed good primary and secondary coverage across the facility. As a CWAP you are called in to perform Spectrum Analysis to identify any interference sources. From the spectrum analysis, you did not identify any interference sources but were able to correctly identify the issue. Which of the following issues did you identify from the spectrum analysis?

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Suggested Answer: D

The most likely issue that can be identified from the spectrum analysis is a power mismatch between the APs and the clients. A power mismatch occurs when the APs transmit at a higher power level than the clients, or vice versa. This can cause asymmetric communication, where one side can hear the other, but not vice versa. This can result in poor performance, disconnections, or packet loss. A spectrum analysis can reveal a power mismatch by showing different signal amplitudes or RSSI values for the APs and the clients on the same channel or frequency. The other options are not correct, as they cannot be identified from the spectrum analysis alone. The tablets' SSID, power save mode, and noise floor can be determined by using other tools or methods, such as protocol analysis, site survey, or device configuration.Reference:[Wireless Analysis Professional Study Guide CWAP-404], Chapter 3: Spectrum Analysis, page 79-80


Contribute your Thoughts:

Shawnna
5 days ago
Haha, the tablets are probably just too lazy to wake up and connect to the APs. Gotta give 'em a good shake!
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Desmond
7 days ago
Power mismatch? That's a classic problem with wireless deployments. I bet that's the culprit.
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Kimberely
9 days ago
A high noise floor? Hmm, I don't know about that. Spectrum analysis should have picked that up, right?
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Sherill
21 days ago
I think it could also be a power mismatch between the APs and the clients.
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Viola
26 days ago
Power save mode? Really? That seems like a stretch, don't you think?
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Aracelis
4 days ago
A: The tablets are connecting to the wrong SSID
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Salina
26 days ago
I agree with Kip, the tablets might not be waking up to receive transmissions.
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Kip
28 days ago
I think the issue is with the tablets entering power save mode.
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Lorenza
1 months ago
The tablets are definitely connecting to the wrong SSID. That's gotta be the issue here.
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Andrew
12 days ago
I'm pretty sure the tablets are connecting to the wrong SSID, that's the problem.
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Lizbeth
14 days ago
Actually, I think there might be a power mismatch between the APs and the clients.
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Talia
18 days ago
No, I believe the issue is a high noise floor resulting in a low SNR.
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Gracia
22 days ago
I think the tablets are entering power save mode and not waking up to receive transmissions.
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