1. Discuss the use of computer networks. What are its goals.

A) Describe the features of LAN.

B) What is meant by piggybacking? What are its advantages and disadvantages?

C) How are errors caused in transmission lines?

D) Explain the Binary and Manchester encoding techniques with an example.

E) What is meant by congestion? List the ways of avoiding congestion.

2. Discuss the issues in network security.

A) Explain multiplexing technique.

B) Discuss the problems associated with Backward Learning.

C) What is transport address? Who will assign it?

D) Why is layered architecture of network preferred?

E) What is the principal difference between circuit switching and packet switching?

F) Explain how errors are detected using CRC.

G) What is meant by Pipelining? Discuss the merits and demerits of using this technique.

H) Discuss about any two methods of framing.