Computer Networks 1 - Dec 2013

Computer Science Engg. (Semester 5)

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. 1 (a) What is data communication ?List and explain the five components of data communication system(6 marks) 1 (b) Discuss the ISO-OSI layered model,Beginning ot the functonalities of each layer(10 marks) 1 (c) Differentiate Between:
ARP and <rarp>
UDP and TCP</rarp>(4 marks) 2 (a) Write a describe note on three causes transmission impairments (8 marks) 2 (b) Explain the transmission modes?(6 marks) 2 (c) Explain delta modulation ?(6 marks) 3 (a) What is FDM? Briefly explain its multiplexing and demultiplexing process.(6 marks) 3 (b) Four sorces create 250 character per second.The frame contain one character from each source and one extra bit for synchronization Find:<be>The data rate of each source
Duration of each character in each source <be>Frame rate
duartion of output frame
Frame size in bits
Data rate of link</be></be>(6 marks) 3 (c) What is time divison multiplexing ?Expalin how statical TDM overcomes the disadvantages of synchronous TDM(8 marks) 4 (a) Describe different types of errors(3 marks) 4 (b) Explain error detection and error detection corrrection with respect to block coding(8 marks) 4 (c) Find the codeword ,Using CRC given data word "10001" and generator "10011'(9 marks) 5 (a) Explain briefly ,With neat figure stop and wait ARQ and Go Back N ARQ(12 marks) 5 (b) Explain the frame formate and translational pahases of point to point protocol(8 marks) 6 (a) Explain :
CSMA
CSMA /CD(12 marks) 6 (b) Describe 802.3 MAC farme(8 marks) 7 (a ) Explain IEEE 802.11 architecture (10 marks) 7 (b) Bring out the difference between repetors ,bridges router and gateway(10 marks) 8 (a) Explain with respect to IPV4 ,classful addresing and classless addresing(10 marks) 8 (b) Explain in detail IPV6 packet formate(10 marks)