1 What is bit rate?
Ans. It is defined as number of bits processed per second.
2 What is baud rate?
Ans. It is defined as number of signal changes per second. At lower rates bit rate and baud rate is almost equal.
3 What is relationship between bit rate & baud rate?
Ans. Baud rate is defined as bit rate upon number of signal elements.
Baud rate = Bit rate/ no. of signal elements
4 Explain data switching, message switching, circuit switching & packet switching.