Foundation of Computer Network - May 2014

Information Technology Engineering (Semester 4)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.

Answer any one question from Q1 and Q2

1 (a) Explain the various transmission impairments in data communication.(6 marks) 1 (b) List the Line Coding schemes in digital transmission. Explain Polar NRZ and Unipolar NRZ schemes.(6 marks) 2 (a) Define spread spectrum. Explain FHSS and DSSS.(6 marks) 2 (b) State and explain the Nyquist theorem and Shannon capacity and solve the following example:
Example: Calculate the maximum bit rate for noiseless channel with a bandwidth of 3000 Hz transmitting a signal with two signal levels.(6 marks)

Answer any one question from Q3 and Q4

3 (a) What is circuit switching? Explain circuit switching in detail with its advantages and disadvantages.(6 marks) 3 (b) Explain TCP/IP protocol suite.(7 marks) 4 (a) Explain ISO/OSI model in detail.(8 marks) 4 (b) Write a short note on Fibre optic cable.(5 marks)

Answer any one question from Q5 and Q6

5 (a) What is Hamming distance ? Explain it with an example. Explain simple parity check code.(7 marks) 5 (b) Explain Error Detection and Correction in Block Coding.(6 marks) 6 (a) What is CRC ? Explain CRC generator and CRC checker with suitable example.(6 marks) 6 (b) What is Checksum? Describe in detail internet Checksum method with suitable example.(7 marks)

Answer any one question from Q7 and Q8

7 (a) Explain FDMA, TDMA and CDMA in detail.(6 marks) 7 (b) What is HDLC ? Explain with the help of its frame format. Describe all fields in detail.(6 marks) 8 (a) Explain CSMA and CSMA/CD in detail.(6 marks) 8 (b) Differentiate : 10Base2, 10Base5 and 10BaseT specification.(6 marks)