GTU Data Communication And Networking - June 2014 Exam Question Paper

GTU Electronics and Communication Engineering (Semester 8)
Data Communication And Networking
June 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) What is network topology? Explain different network topologies with example and compare them.

7 M

1 (b) (i) Which of the OSI layers handles each of the following :
- Determine which route through the subnet to use.
- Dividing the transmitted bit stream into frames.
- Encryption and compression of the information.
- Flow control between source and destination node.

4 M

1 (b) (ii) Compare Packet Switching and Circuit Switching.

3 M

2 (a) Explain ATM Reference Model in detail.

7 M

2 (b) (i) Explain the terms : LAN , MAN ,WAN , Internet .

4 M

2 (b) (ii) Compare X.25 and Frame Relay.

3 M

2 (c) (i) Explain cyclic redundancy check in detail.

4 M

2 (c) (ii) Compare FDM,WDM and TDM.

3 M

3 (a) Write the functions of Media Access Control sub layer. And Compare pure ALOHA and slotted ALOHA.

7 M

3 (b) Explain Sliding window protocol using GO back to N.

7 M

3 (c) Differentiate between the following
(I) Active hub, Passive hub and Repeater. (II) Router and Gateways.

7 M

3 (d) Why CSMA/CA is used for wireless network? Explain it.

7 M

4 (a) Explain and compare distance vector routing and link state routing algorithm.

7 M

4 (b) List the various duties of the transport layer and explain each in brief. Compare UDP and TCP

7 M

4 (c) Write about elements of transport layer (1) connection establishment (2) connection release.

7 M

4 (d) Draw IPV4 header format and explain the each field of the header. Also explain the concept of fragmentation in detail.

7 M

5 (a) Explain DNS in detail with example.

7 M

5 (b) Answer the following questions. (I) RSA algorithm. (II) Transposition cipher.

7 M

5 (c) Answer the following questions. (I) FTP (II) HTTP

7 M

5 (d) Explain the e-mail architecture and services. Write short note on POP3 and SMTP

7 M

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