Which statement accurately describes the relationship between SNR and data rate in Wi-Fi networks?

Signal-to-Noise Ratio (SNR)directly influences themodulation and coding scheme (MCS)that can be used between a Wi-Fi client and AP. A higher SNR allows the AP to select higher-order modulations (e.g., 256-QAM or 1024-QAM), which increases throughput efficiency.

According toRUCKUS One Online Help – RF Signal and SNR Concepts, an SNR of around 25 dB or greater is typically required for high-rate modulation such as MCS 9 or above.

RUCKUS Analytics 3.5 User Guide – PHY Metricsconfirms that RUCKUS APs continuously adapt MCS levels based on SNR, optimizing link performance dynamically.

Lower SNR conditions force modulation downshifts (e.g., QPSK or BPSK), reducing data rates for reliability.