CWNA Wireless Network Administrator

Answer - C - You should record the signal-to-noise ratio to perform a site survey.

Key Takeaway: Signal-to-noise ratio, or SNR, is a measure used to quantify how much a signal has been corrupted by noise. It is defined as the ratio of signal power to the noise power corrupting the signal. A ratio higher than 1:1 indicates more signal than noise. You should have enough information about the SNR to perform a site survey.