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/n/ac network. After collecting informationfrom 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 thecompany's baseline, which is 9%.
Based on this information, what troubleshooting step should follow to isolate the problem?
A. Check theframe 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.