IV SEMESTER B.C.A. EXAMINATION MAY/JUNE 2010
Y2K8 SCHEME
COMPUTER SCIENCE
BCA 404 : DATA COMMUNICATION AND NETWORKS
Time : 3Hours Max.Marsk: 90
Instruction : Answer all sections
SECTION-A
Answer any ten questions.Each question carries two marks.
1.What is a protocol ? Give two examples.
2.Define Communication network.
3.Define SNR.
4.A telephone channel has a bandwidth of 3.4 Khz and SNR OF 10,000 .Find the channel capacity.
5.define single bit error and burst error.
6.Give 2 difference between oriented and connectionsless service.
7.Compare connection-oriented and connectionless service.
8.Briefly explain the use of flow control in communication network.
9.What is random access protocol ? Give examples.
10.Define unicast and multicast physical address ?
11.What is routing ? give the classification of routing algorithms.
12.Briefly explain the functions of a packet switch.
SECTION -B
Answer any five questions.Each question carries five marks. 5 X 5 = 25
13.Briefly explain about ARPANET.
14.Explain any two TCP/IP applilcation layer protocol.
15.Compare Analog and Digital Transmissions.
16.Sketch the signal waveforms when 110101 are transmtted in the following signal codes
a) Unipolar b)Polar NRZ.
17. Explain briefly about point to point protocol.
18.Briefly explain about point to point protocol.
19.Explain the features of FDDI?
20.Explain the working of a packet switched network.
SECTION-C
Answer any three questions.Each question carries fifteen marks. 15 X 3 = 45
21.a)Briefly explain the key factors in communication network evolution. 5 + 10
b)Explain the OSI reference model, Listing the functions of each layer.
22.a) Explain the internal structure of optical fiber cable. lsit the advantages of optical fibers
over copper cables.
b)Explain CRC method of error detection.Give an example. 8 + 7
23.a)Explain time division switches.
b)What is the dis advantage of G0 back N protocol ?Explain how it is overcome
in Selective repeat protocol. 5 + 10
24.a)Explain CSMA/CD protocol.
b) What is channelization ? List the 3 types of channelization schemes.
Explain any one. 7 + 8
25.a)Explain with a neat figure. 802.3 frame format.
b) Compare link state routing and distance vector routing. 10 + 5
Y2K8 SCHEME
COMPUTER SCIENCE
BCA 404 : DATA COMMUNICATION AND NETWORKS
Time : 3Hours Max.Marsk: 90
Instruction : Answer all sections
SECTION-A
Answer any ten questions.Each question carries two marks.
1.What is a protocol ? Give two examples.
2.Define Communication network.
3.Define SNR.
4.A telephone channel has a bandwidth of 3.4 Khz and SNR OF 10,000 .Find the channel capacity.
5.define single bit error and burst error.
6.Give 2 difference between oriented and connectionsless service.
7.Compare connection-oriented and connectionless service.
8.Briefly explain the use of flow control in communication network.
9.What is random access protocol ? Give examples.
10.Define unicast and multicast physical address ?
11.What is routing ? give the classification of routing algorithms.
12.Briefly explain the functions of a packet switch.
SECTION -B
Answer any five questions.Each question carries five marks. 5 X 5 = 25
13.Briefly explain about ARPANET.
14.Explain any two TCP/IP applilcation layer protocol.
15.Compare Analog and Digital Transmissions.
16.Sketch the signal waveforms when 110101 are transmtted in the following signal codes
a) Unipolar b)Polar NRZ.
17. Explain briefly about point to point protocol.
18.Briefly explain about point to point protocol.
19.Explain the features of FDDI?
20.Explain the working of a packet switched network.
SECTION-C
Answer any three questions.Each question carries fifteen marks. 15 X 3 = 45
21.a)Briefly explain the key factors in communication network evolution. 5 + 10
b)Explain the OSI reference model, Listing the functions of each layer.
22.a) Explain the internal structure of optical fiber cable. lsit the advantages of optical fibers
over copper cables.
b)Explain CRC method of error detection.Give an example. 8 + 7
23.a)Explain time division switches.
b)What is the dis advantage of G0 back N protocol ?Explain how it is overcome
in Selective repeat protocol. 5 + 10
24.a)Explain CSMA/CD protocol.
b) What is channelization ? List the 3 types of channelization schemes.
Explain any one. 7 + 8
25.a)Explain with a neat figure. 802.3 frame format.
b) Compare link state routing and distance vector routing. 10 + 5
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