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what troubleshooting step should follow to isolate the problem?

Given:

You have been sent as a consultant to a customer site that is experiencing problems with some
2.4 GHz clients on their 802.11a/g network. After collecting information from the company about
the problem, your initial troubleshooting step is to find a client device experiencing performance
problems and observe its 802.11 frame exchanges in a protocol analyzer. The retransmission rate
for that client is 65% instead of the company’s baseline, which is 9%.
Based on this information, what troubleshooting step should follow to isolate the problem?

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A.
Check the frame decodes in the protocol analyzer and look for an excessive number of
deauthentication frames.

B.
Evaluate the client’s operating frequency band with a spectrum analyzer, looking for a high
noise floor or interference sources.

C.
Utilize a laptop-based site survey and planning tool to create a predictive model of the optimal
AP placement in the customer’s facility.

D.
With a protocol analyzer, identify the client’s roaming threshold settings and reassociation
behavior.

E.
Install Wi-Fi endpoint security and reporting software on the client device to monitor and log the
retransmission behavior.

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