Computer Networks:

1. What are the two different transmission modes that you can use when you transmit data digitally? Explain? (Minimum 50 words) 2. What is the channel capacity for a teleprinter channel with a 300 Hz bandwidth and a signal-tonoise ratio of 3 DB? (Hint: Shannons equation) 3. Distinguish between multilevel TDM, multiple-slot TDM, and pulse-stuffed TDM? (Minimum 50 words)

4. Television channels are 6 MHz wide. How many bits/sec can be sent if four-level digital signals are used?( Hint: Assume it is a noiseless channel.)