Important Question of Data Communication

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1. What  is transmission media ? Describe the types of transmission impairments.
2. What is multiplexing ? Difference between TDMA and FDMA with necessary diagram.
3. What is signal encoding ? Differentiate analog and digital transmission.
4. Why Optical fiber is the future of data communication ? Give your own answer.
5. Difference between guided media and unguided media.
6. What is generic communication, explain PSTN in detail.
7. What is network topology ? Explain various types diagram.
8. Discuss simplex, half duplex and full duplex system with example.
9. What do you understand by wireless propagation ? Explain different ways of wireless propagation.
10. Define CSMA and CSMA/CD with appropriate diagram.
11.  Explain PCM system with block diagram in detail. Explain E1 and T1 carrier.
12. What is line coding. List out various types of line coding.
13. What is electro mechanical switching ? Explain circuit and packet switching with suitable example.
14. Explain Line Of Sight (LOS) propagation. Difference between message and packet switching with example.
15. write short notes :

• Twisted pair and coaxial cable
• Sampling
• Quantization
• Circuit switching 
• Packet switching
• satellite transmission