Question 290
During follow-up testing at a medical clinic, engineers review a previously reported fault: A 5 GHz deployment assumes every advertised channel can be used immediately without DFS availability or client restrictions. Which observation confirms resolution rather than an unrelated improvement?
Explanation
Correct Answer
AP startup and client discovery follow the applicable channel-availability requirements. This directly checks the outcome of the chosen remediation and confirms the problem was not merely hidden. The diagnostic issue was: certain 5 GHz channels require radar checks and may behave differently across clients.
Incorrect Answers
Client SNR improves and retransmission rates fall at the affected survey points. This would demonstrate a different scenario was fixed—a wireless survey reports that strong RSSI proves adequate link quality while a high noise floor is suppressing usable SNR—but does not validate recovery from a 5 GHz deployment assumes every advertised channel can be used immediately without DFS availability or client restrictions.
Channel-utilization and retry measurements improve under equivalent evening traffic. This would demonstrate a different scenario was fixed—an apartment complex shows poor 2.4 GHz throughput where neighboring networks occupy the same busy primary channel—but does not validate recovery from a 5 GHz deployment assumes every advertised channel can be used immediately without DFS availability or client restrictions.
Observed active-client widths and retry rates support a capacity-oriented width setting. This would demonstrate a different scenario was fixed—an engineer specifies a 160 MHz channel for a congested site but most clients support only 40 or 80 MHz operation—but does not validate recovery from a 5 GHz deployment assumes every advertised channel can be used immediately without DFS availability or client restrictions.