Given RSSI readings A: -72 dBm, B: -75 dBm, C: -65 dBm, D: -80 dBm — which two statements are correct?

RSSI values are negative, and a value closer to zero indicates a stronger signal. Therefore, -65 dBm (C) is the strongest, and -80 dBm (D) is the weakest. A 3 dB difference represents a doubling or halving of power. A 10 dB difference represents a 10x increase or decrease in power. The RF signal strength at location B is 50% weaker than location A: Location A is -72 dBm, and B is -75 dBm. This is a 3 dB difference (-75 is 3 dB lower than -72), meaning B has half the power (50% weaker) of A. The RF signal strength at location C is 10 times stronger than location B: Location C is -65 dBm, and B is -75 dBm. This is a 10 dB difference (-65 is 10 dB higher than -75), meaning C has 10 times the power of B. Incorrect options: The signal strength at location C is too weak to support web surfing: -65 dBm is generally considered good for web surfing and other applications. Location D has the strongest RF signal strength: Location D (-80 dBm) has the weakest signal. The signal strength at location B is 10 dB better than location C: Location B (-75 dBm) is 10 dB worse than C (-65 dBm).