1. Explain analog-to-digital conversion and its significance in digital communication Discuss the steps involved and the Nyquist theorem's role. Provide examples of applications.

2. Compare modulation techniques (ASK, FSK, PSK) in digital communication Evaluate their performance and real-world applications.

3. Describe multiplexing principles, differentiating between TDM and FDM. Evaluate advantages and limitations.

4. Discuss transmission impairments (noise, distortion, attenuation) in network communication. Explain causes, effects, and mitigation techniques.

5. Explain network switching (circuit, packet, virtual circuit). Compare architecture and suitability for applications.