Which signal strength and noise pair meets the minimum SNR for voice networks?
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Correct answer: signal strength -69 dBm, noise 94 dBm.
Why this is the answer
The correct answer is signal strength -69 dBm, noise 94 dBm because it provides the minimum required Signal-to-Noise Ratio (SNR) for voice networks. For reliable voice over Wi-Fi, a minimum SNR of 25 dB is generally recommended. SNR is calculated as Signal Strength (dBm) - Noise (dBm). Let's calculate the SNR for each option: 66 dBm - (-90 dBm) = 24 dB 67 dBm - (-91 dBm) = 24 dB 68 dBm - (-89 dBm) = 21 dB 69 dBm - (-94 dBm) = 25 dB Only the last option meets or exceeds the 25 dB SNR requirement for voice. The other options result in an SNR below the recommended threshold, which could lead to poor voice quality, dropped calls, or unreliable connections.
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