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Posted By: prashanth beerelli Member Level: Diamond Posted Date: 04 Sep 2008
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2006 Jawaharlal Nehru Technological University Computer Science & Engineering III B.Tech I Semester Regular Examinations, November 2006 DATA COMMUNICATIONS Question paper
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Code No: RR310503 Set No. 1
III B.Tech I Semester Regular Examinations, November 2006
DATA COMMUNICATIONS
( Common to Computer Science & Engineering, Information Technology
and Computer Science & Systems Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. Explain Analog transmission for Analog signal, and Digital transmission for Analog
signal clearly with examples. [16]
2. (a) What is the difference between Asynchronous & Synchronous data formats.
(b) How do you identify characters in the given Asynchronous encoded bit stream.
Explain with example. [10+6]
3. (a) Define data link protocol?
(b) What is ISO OSI model and explain. [3+13]
4. List and describe the access control methods? [16]
5. (a) Differentiate between PAP and CHAP.
(b) Give an overview of different switching methods. [8+8]
6. (a) What is ISDN? Describe the services provided by it.
(b) Discuss the evolution of ISDN. [10+6]
7. What is the purpose of leaky bucket algorithm. Discuss about it with flow chart
and example. [16]
8. (a) Prove that the data rate for SPE in STS-1 is only 50.112 Mbps.
(b) What is the duration of a frame in STS-1.
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