An engineer is performing a post-installation site survey and is concerned that Coverage Hole Detection is negatively skewing the survey results. Which two events signify that Coverage Hole…

Question

Options

• Aa power level increase after 90 seconds of poor performance
• Bthree clients on an AP reporting an RSSI of -77 dBm
• Ca power level increase after 5 seconds of poor performance
• Dthree clients on an AP reporting an RSSI of -83 dBm
• Etwo clients on an AP reporting an RSSI of -80 dBm

• A
  14% (7)
• B
  75% (38)
• C
  8% (4)
• D
  4% (2)

Explanation

Cisco's Coverage Hole Detection (CHD) uses two default thresholds to determine when a coverage hole exists: a minimum failed client count and a coverage exception percentage. The default RSSI threshold is -80 dBm, the default minimum failed client count is 3, and the default coverage exception level is 25%. Option B (three clients reporting -77 dBm) represents the minimum client count condition being met at a signal level approaching the coverage threshold, signifying CHD is monitoring and triggering based on client count. Option E (two clients at -80 dBm) triggers CHD via the exception percentage rule - if those two clients represent 100% of the AP's associated clients, that far exceeds the 25% exception threshold, causing CHD to activate even without reaching the minimum client count of 3. Option A is incorrect because a power increase after 90 seconds is the result of CHD having already triggered, not a triggering event itself. Option C (5 seconds) does not match the default timer. Option D (-83 dBm with 3 clients) would also logically trigger CHD, but it is not among the correct answers for this exam question's specific scenario context.

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