Computer Science Engg. (Semester 5)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) What is protocol? Define the key elements of protocol ?(5 marks)
1 (b) Define network topology ,Explain ring topology with advantages and disadvantages(5 marks)
1 (c) Explain the different levels of addressing used in an internet with a suitable example for each level of addresing in TCP/IP ?(10 marks)
2 (a) Explain the following:
Bandwidth
Through put
Transmission time
Latency
Jitter(5 marks)
2 (b) Explain with the block diagram the cause for transmission inpairmainrts .(9 marks)
2 (c) Explian with neat waveform any two polar line coding schemes(6 marks)
3 (a) What is multiplexing ? Explain with a neat diagram FDM.(8 marks)
3 (b) Explain how time- divison - multiplexing difffers from FDM ,With a neat diagram?(4 marks)
3 (c) What is switching ? Differentiate circuit switch network with packet -Switched network(8 marks)
4 (a) What is internet checksum? List the steps udertaken by sneder and receivar for error detection.(6 marks)
4 (b) Expalin with an example of block coding method for error detection and correction ?(10 marks)
4 (c) What is the hamming distance ? Find the minimum hamming distance of the coding scheme show in the table
| Data word | Code word |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 1 | 0 | 1 | 0 | 1 | 1 |
| 1 | 0 | 1 | 0 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 0 |
(4 marks)
5 (a) Calculate the time to send 2 milion bits of dat in a system the uses stop and wait protocols .If the distance between sender and receiver is 2000km .Assume packet size 400bits and propagation speed is 2 ×108m.no data or control frame is lost(10 marks)
5 (b) Explain the frame formats and transmitional phase of point -to -point protocol(10 marks)
6 (a) Explain why colllision in an random access protocol but in controllled acess or channelizing protocol?(4 marks)
6 (b) Explain any two popular control access method ,With a neat diagram(8 marks)
6 (c) Explain 802.3 MAC frame formate(8 marks)
7 (a ) Explain the service of IEEE 802.11 standard (4 marks)
7 (b) Write a short note on:
Blue tooth
Celleular telehone(10 marks)
7 (c) Explain the five standard of Imt -2000radio -interface of 3G system?(6 marks)
8 (a) Expalin briefly the advantages of IPV6(6 marks)
8 (b) Find the metid and hostid of the following IP address?
111.64.2.6
131.57.9.3
207 .64.52.11
225.34.2.1(8 marks)
8 (c) Write short note on network addreess translation (NAT)(6 marks)
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