Difference between sampling rate and baud rate and their relation to channel capacity

1. Is baud rate same as sampling rate?
2. What is the relationship between sampling rate and frequency?
3. What is channel sampling rate?

Is baud rate same as sampling rate?

The baud rate is how fast I can open and close the shutter. The sample rate is how often you look at my flashing light. For information to flow, you need to look (sample) faster than I'm flashing.

What is the relationship between sampling rate and frequency?

Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.

What is channel sampling rate?

The sampling frequency or sampling rate, f_s, is the average number of samples obtained in one second, thus f_s = 1/T. Its unit is sample per second or hertz e.g. 48 kHz is 48,000 samples per second.