Vellore Institute of Technology 2007 MS Software Engineering Data Communication and Computer Networking - Question Paper

VIT U N I V E R S I T Y

School of Computing Sciences
Term End Arrear exam – April 2007
M.S. (Software Engineering) – IV Semester
Batch: [2002, 2003 & 2004]
Subject: Data Communication and computer Networks
Time: 3 Hours Max Marks:100

PART – A (20 X two = 40 Marks)

ans ALL the ques.

1. Compare dejure standard and defacto standard.

2. Give a disadvantage of every kind topology.

3. Why was OSI model developed?

4. A periodic composite signal with a bandwidth of 3000Hz is composed of 2 sinne waves. The 1st 1 has a frequency of 500Hz with a maximum of 30 Volts and the 2nd 1 has a maximum of 10 Volts. Draw the frequency spectrum.

5. What is handoff in cellular telephony?

6. What is inverse multiplexing?

7. Calculate the VRC and LRC for the subsequent bit trend using even parity:
0011101 1100111 1111111 0000000.

8. In a stop and wait ARQ, what happened if a NAK is lot in transit? Why there is no need for NAKS to be numbered?

9. Using BSC, show the sequence of frames for the subsequent scenario ranging from 2 computers in a point-to-point configuration:
a) Computer a tasks permission from computer B to send data.
b) Computer b responds positively
c) Computer a sends 3 frames, every consisting of four blocks of 400 bytes.
d) Computer b acknowledges the receipt.

10. Compare TSI to a TDM Bus.

11. How a repeater is various from a amplifier?

12. In HDLC what is bit shifting and why it is needed?

13. What are the fields in TDPU?

14. find the netid and hostid of the subsequent IP addresses
a) 129.14.6.8
b) 225.23.34.12.

15. Compare IPV4 and IPV6.

16. What is multi casting?

17. Why is client server programs is finite and the server program infinite?

18. What is the purpose of domain name system?

19. Mention the 5 kinds of message in RTCP.

20. List any 3 multimedia applications.

PART-B (5 X 12 = 60 Marks)

ans All the ques.

21. (a) With a diagram discuss the responsibilities of various layers in internet model. [12]
OR
21. (b) (i) explain the 2 popular approaches of packet switching. Compare circuit and packet switching. [8]
(ii) presume a data is made of 01001110. Encode this stream using the subsequent encoding schemes. [4]
(a) Unipolar
(b) Differential Manchester.

22. (a) (i) discuss how the sliding window protocol of window size 7 is working. [6]
(ii) How does a taken ring LAN operate? [6]
OR
22. (b) (i) explain about the various kinds of frames in HDLC with next diagram. [9]
(ii)The code 10011100101 was received using the hamming encoding algorithm. What is the original code send? [3]

23. (a) (i) discuss the distance vector algorithm with an example. [8]
(ii) explain the subsequent 2 internet control protocols. [4]
(a) ICMP
(b) RARP.
OR
23. (b) explain the primitives and problems of IPV6 [12]

24. (a) explain the duties of transport layer in detail. [12]
OR
24. (b) Draw the frame format and discuss the subsequent protocols [12]
(i)UDP
(ii)TCP.

25. (a) explain the subsequent internet application [12]
(i) FTP
(ii) DNS
(iii)TELNET.
OR
25. (b) explain the 2 protocols used in multimedia networking [12]
(i) RTSP
(ii) RTP.

Earning:   Approval pending.