Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 621

Which unit of measure is used to measure wireless RF SNR?

Answer options

• A. dBi
• B. dB
• C. dBm
• D. mW

Correct answer: B

Explanation

The correct answer is B, dB, which stands for decibels and is the standard unit for measuring the ratio of signal power to noise power. Options A (dBi), C (dBm), and D (mW) refer to different measurements such as antenna gain, absolute power, and power in milliwatts respectively, and are not suitable for measuring SNR.