Spectrum at a municipal garage shows high duty cycle on the working channel, yet 802.11 retry counters stay low. What performance impact is still likely?
Select an answer to reveal the explanation.
Short Explanation
The medium can be busy even when Wi-Fi frames look clean—like cars waiting at a light for a parade that is not in their lane. Non-Wi-Fi energy trips CCA and steals airtime.
Full Explanation
Clear Channel Assessment treats energy above threshold as busy regardless of 802.11 framing. Non-Wi-Fi interferers can elevate duty cycle and defer transmissions without producing Wi-Fi CRC/retry spikes. Throughput still falls because stations wait for idle medium; assuming only CRC errors matter, or auto-widening channels, misdiagnoses the problem.