Download JNTUH MCA 3rd Sem R13 2018 January 813AR Computer Networks Question Paper

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Code No: 813AR R13

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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA III Semester Examinations, January - 2018

COMPUTER NETWORKS

Time: 3 Hours Max. Marks: 60

Note: This question paper contains two parts A and B.

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Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 8 marks and may have a, b, as sub questions.

PART - A

5 x 4 Marks =20

1. Why protocols and standards needed. [4]
2. Define about random access of channel. [4]

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3. Write the functionality of network layer. [4]
4. What is meant by Tunneling? [4]
5. Explain about TELNET. [4]

PART - B

5 x 8 Marks =40

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1. What is meant by CRC codes?

   Compare and contrast the Go-Back-N ARQ protocol and Selective Repeat ARQ protocol. [4+4]

   OR

   Define Piggybacking and its usefulness.

   Explain the TCP/IP Protocol suite. [4+4]

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2. Describe in detail about pure ALOHA.

   What are the uses of a router and gateway? [4+4]

   OR

   What is the importance of spanning tree bridges.

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   Explain about CSMA/CA. [4+4]

3. Explain Distance vector routing with an example.

   Give a detailed description on store and forward packet switching. [4+4]

   OR

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   What is meant by congestion in network? Explain any algorithm for congestion avoidance.

   What is meant by hierarchical routing explain? [4+4]

4. Compare and Contrast the fields in the main header of IPv4 and IPv6.

   Explain the addressing mechanism in transport layer. [4+4]

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   OR

   Explain the extension headers of IPv6.

   Explain about connection establishment and release in Transport layer. [4+4]

5. Write short on Application layer protocols

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   a) HTTP

   b) FTP [4+4]

   OR

   What are the services provided by the User agent of Electronic mail system explain.

   Explain the header fields of TCP. [4+4]

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