Code No: 823AE R15
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
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MCA III Semester Examinations, August - 2017
COMPUTER NETWORKS
Time: 3hrs Max.Marks:75
Note: This question paper contains two parts A and B.
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Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
5 x 5 Marks = 25
- What is Hamming code? How it is useful in computer networks? [5]
- Write the functions of MAC and LLC. [5]
- What is optimality principle in routing? Explain briefly. [5]
- Describe in detail about tunneling. [5]
- Compare TCP and UDP. [5]
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PART -B
5 x 10 Marks =50
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- Describe the layers of OSI reference model and compare it with TCP model. [10]
OR
Explain stop and wait protocol in detail. - Explain, How flow control is achieved in datalink layer? [5+5]
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Explain in detail about ALOHA protocol. [10] - Describe MAC protocol operations on a token ring.
OR
Give a note on frame formats of token ring. [5+5] - What is flooding and describe reliable flooding.
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OR
Describe hierarchical routing. [5+5] - Explain in detail about link state routing algorithm. [10]
OR
Describe Address resolution protocol in detail. [10] - Describe dynamic host congestion protocol in detail.
OR
Write the services of transport layer. [5+5] - Describe TCP header in detail.
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Write short notes on
a) TELNET
b) SMTP protocol. [5+5]
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