A client measures signal -67 dBm and noise floor -85 dBm. What is the SNR?
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Correct answer: 18 dB.
Why this is the answer
Signal-to-Noise Ratio (SNR) is calculated by subtracting the noise floor from the signal strength. In this case, the signal strength is -67 dBm and the noise floor is -85 dBm. Therefore, SNR = -67 dBm - (-85 dBm) = -67 dBm + 85 dBm = 18 dB. This value indicates a good quality signal relative to the background noise. The other options are incorrect because they do not result from the correct calculation.
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