1) What is the importance of Physical Layer of OSI model?

2) What do you mean by Transmission Media? Describe its 3 major types.

3) What do you mean by Data Link Layer of OSI model? Describe its tasks.

4) Discuss the Line Discipline policies of DLL in detail with appropriate diagrams.

5) Explain in detail the Stop & Wait Flow Control concept.

6) Explain in detail the Sliding Window Flow Control concept.

7) Discuss all the error control situations for:

a. Stop & Wait ARQ b. Go Back n ARQ c. Selective Repeat ARQ

8) In HDLC, what are the various Stations, Configurations and Modes available?

9) In HDLC, what is Bit Stuffing? Explain its implementation in detail.

10) In HDLC, explain the various Frame types with their usage & structure.

11) In HDLC, explain the Control Field of S-Frame in detail.

12) What is ATM and its architecture ?

13) Explain ATM layer?

14) Expain the working of token ring protocol?Discuss its implementation with proper diagram?

15) What do you mean by token ring?Explain its frame format?

16) What do you mean by multiplexing? Explain FD and Td with proper diagrams?

17) Explain in detail TCP/IP model of network.

18) Differentiate among Twisted pair, Co-axial & fiber optic.

19) What are errors in Data Transmission? Explain their types & parity checking concepts.

20) Write short note on:

a.)Pulse code modulation

b.)CRC

c.)Hamming code

21) What do you mean by cryptography? Explain any 2 convention encryption methods in detail.

22) Explain any 2 bit-level encryption methods in details. Also list the advantages of bit level encryption over character level.

23) What is public key encryption? Discuss the RSA methods and its benefits.

24) Write the functions of presentation layer. Explain huffman encoding method with example.

25) What are Routing algorithms? Explain Link State Routing with diagram.

26) Write short note on:

Flooding

Routers and gateways

Virtual Circuits

27) What are switches? Explain any 2 types of switches. Also state the switch type used in ATM.

28) Dijkstra Algorithm steps and numerical.