Maximum data rate is affected by the bandwidth and signal-to-noise ratio of the channel.

Yes, that's correct. The maximum data rate that can be achieved in a communication channel is affected by both the available bandwidth and the quality of the signal, as characterized by the signal-to-noise ratio (SNR). The bandwidth determines the range of frequencies that can be transmitted, while the SNR refers to the ratio of the signal power to the noise power in the channel. A higher SNR allows for better signal quality and thus a higher data rate, while a narrower bandwidth limits the range of frequencies that can be transmitted and thus also affects the data rate.