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?

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.