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.