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Computer Networks Question Paper - Dec 17 - Computer Science (Semester 5) - Visveswaraya Technological University (VTU)
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Computer Networks - Dec 17
Computer Science (Semester 5)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Answer Q1 or Q2, Q3 or Q4, Q5 or Q6,Q7 or Q8,Q9 or Q10.
(2) Neat diagrams must be drawn wherever necessary.
(3) Figures to the right indicate full marks.
(4) Assume suitable data if necessary.
Module-1
1.a.
Compare client server and Perl-to-Peer architecture.
(5 marks)
00
1.b.
Describe HTTP with persistent and non-persistent connections.
(8 marks)
00
1.c.
What are the services provided by DNS?
(3 marks)
00
OR
2.a.
Demonstrate socket implementation using TCP.
(8 marks)
00
2.b.
Write a note on web caching.
(4 marks)
00
2.c.
Illustrate the basic operation of SMTP with an example.
(4 marks)
00
Module-2
3.a.
Elaborate the three way handshaking in TCP.
(5 marks)
00
3.b.
Discuss Go-Back N protocol.
(6 marks)
00
3.c.
Explain the connection-oriented multiplexing and de-multiplexing.
(5 marks)
00
OR
4.a.
State congestion and discuss the cause of congestion.
(4 marks)
00
4.b.
With a neat diagram, explain the TCP segment structure.
(8 marks)
00
4.c.
Suppose that two measured sample RTT values are 106 $ms$ and 120 $ms$. Compute:
(4 marks)
00
- Estimated RTT after each of these sample RTT value is obtained. Assume $\alpha$ = 0.125 and estimated RTT is 100 $msec$ just before of the samples obtained.
- Compute DevRTT.
Assume $\beta$ =0.25 and DevRTT was 5 $msec$ before first of these samples are obtained.
Module-3
5.a.
Write the link-state routing algorithm. Solve the following graph using link-state algorithm with source node 'u'.
(8 marks) 00
5.b.
What is routing? Explain the structure of a router.
(8 marks)
00
OR
6.a.
Discuss the IPV6 packet format.
(5 marks)
00
6.b.
Elaborate the path attributes in BGP and steps to select the BGP routes.
(5 marks)
00
6.c.
List the broadcast routing algorithms. Explain any one of them.
(6 marks)
00
Module-4
7.a.
Show the components of GSM 2G cellular network architecture with a diagram.
(7 marks)
00
7.b.
Illustrate the steps involved in mobile IP registration with home agent.
(5 marks)
00
7.c.
Write a note on mobile IP.
(4 marks)
00
OR
8.a.
Define Handoff. Explain the steps accomplishing a handoff.
(7 marks)
00
8.b.
Bring out the mechanism of direct routing to mobile node in mobility management.
(6 marks)
00
8.c.
Compare the 4G LTE standard to 3G systems.
(3 marks)
00
Module-5
9.a.
Elaborate the features of streaming stored video.
(3 marks)
00
9.b.
With a neat diagram, explain the CDN operation.
(8 marks)
00
9.c.
Summarize the limitations of Best-effort IP service.
(5 marks)
00
OR
10.a
Explain the different internet architecture.
(5 marks)
00
10.b.
Describe the leaky bucket policing mechanism.
(6 marks)
00
10.c.
Discuss the round-robin and waited fair queuing scheduling mechanism.
(5 marks)
00
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