Foundation of Computer Network - May 2015

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) Distinguish between baseband transmission and broadband transmission.(4 marks) 1 (b) Explain pulse code modulation.(4 marks) 1 (c) List the line coding schemes in digital transmission. Explain Polar NRZ scheme.(4 marks) 2 (a) Explain various transmission impairments in detail.(6 marks) 2 (b) Draw and explain FDM and TDM.(6 marks)

Answer any one question from Q3 and Q4

3 (a) Explain ISO-OSI model in detail.(8 marks) 3 (b) Write a short note on Virtual circuit networks.(5 marks) 4 (a) Explain with suitable example guided transmission media and unguided transmission media.(8 marks) 4 (b) Write a short note on TCP/IP protocol stack.(5 marks)

Answer any one question from Q5 and Q6

5 (a) Discuss the concept of redundancy in error detection and correction.(8 marks) 5 (b) Explain linear code block.(5 marks) 6 (a) Explain Go-back-N automatic repeat request protocol.(5 marks) 6 (b) What is Checksum ? Describe in detail internet checksum method with suitable example.(8 marks)

Answer any one question from Q7 and Q8

7 (a) Discuss CSMA/CD random access technique. How is collision avoidance achieved in the same?(7 marks) 7 (b) Explain TDMA and FDMA.(5 marks) 8 (a) Compare and contrast FDMA and CDMA in detail.(8 marks) 8 (b) Explain PPP in detail.(4 marks)