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

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 3rd Sem (Third Semester) Regulation-R13 2018 January 813AR Computer Networks Previous Question Paper

R13

Code No: 813AR

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.

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, c as sub questions.



PART - A

















5 ? 4 Marks = 20

1.a) Why protocols and standards needed.











[4]

b) Define about random access of channel.











[4]



c) Write the functionality of network layer.











[4]

d) What is meant by Tunneling?













[4]

e) Explain about TELNET.















[4]





PART - B

















5 ? 8 Marks = 40

2.a)

What is meant by CRC codes?

b)

Compare and contrast the Go-Back-N ARQ protocol and Selective Repeat ARQ protocol.

























[4+4]

OR

3.a)

Define Piggybacking and its usefulness.

b)

Explain the TCP/IP Protocol suite.











[4+4]



4.a)

Describe in detail about pure ALOHA.

b)

What are the uses of a router and gateway?









[4+4]

OR

5.a)

What is the importance of spanning tree bridges.

b)

Explain about CSMA/CA.















[4+4]


6.a)

Explain Distance vector routing with an example.

b)

Give a detailed description on store and forward packet switching.



[4+4]

OR

7.a)

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

b)

What is meant by hierarchical routing explain?









[4+4]





8.a)

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

b)

Explain the addressing mechanism in transport layer.







[4+4]

OR

9.a)

Explain the extension headers of IPv6.

b)

Explain about connection establishment and release in Transport layer.



[4+4]



10.

Write short on Application layer protocols

a) HTTP
b) FTP



















[4+4]

OR

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

b) Explain the header fields of TCP.













[4+4]



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