Foundation of Computer Network - Dec 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.

Solve any one question from Q1 and Q2

1 (a) Write a short note on Analog signals and Digital signals with the help of waveforms.(6 marks) 1 (b) Write a short note on Spread Spectrum.(7 marks) 2 (a) 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.(7 marks) 2 (b) Write a short note on transmission modes in detail.(6 marks)

Solve any one question from Q3 and Q4

3 (a) Explain guided media with suitable diagrams.(6 marks) 3 (b) Explain TCP/IP protocol suit with layered architecture.(6 marks) 4 (a) Compare and contrast circuit switched network with packet switched network.(6 marks) 4 (b) Explain different addressing schemes in TCP/IP model.(6 marks)

Solve any one question from Q5 and Q6

5 (a) Write a short note on internet checksum.(6 marks) 5 (b) What is CRC? Generate the CRC code for message 1101010101. Given generator polynomial g(x)=x⁴+x²+1.(7 marks) 6 (a) Discuss the concept of redundancy in error detection and correction.(7 marks) 6 (b) Explain in detail Go-Back-N and Selective Repeat ARQ System.(6 marks)

Solve any one question from Q7 and Q8

7 (a) Discuss Fast Ethernet technology in brief. State its specification.(6 marks) 7 (b) Explain the HDLC frame formats i.e. I-frame. S-frame. U-frame.(6 marks) 8 (a) Explain TDMA and FDMA.(6 marks) 8 (b) Explain CSMA and CSMA/CD. Also comment on the efficiency of each.(6 marks)