IV Semester B.C.A. Examination ,April/may 2012
Y2K8 SCHEME
COMPUTER SCIENCE
BCA-404:DATA COMMUNICATION AND NETWORKS
TIME:3HOURS MAX.MARKS:90
INSTRUCTION:Answer all the questions
SECTION-A
Answer any 10 questions..Each questin carries 2 marks each. 2X10=20
1.what is protocol ? Give two examples.
2.Define Multiplexing.
3.Expand HTTP. Where it is used ?
4.Mention three types of Switching Techniques.
5.Define Routing.
6.What is the use of TELNET?
7.Define Attenuation.
8.What ar single bit errors and burst errors.
9.What is framing?
10.What is pipelining?
11.What is ALOHA?
12.Compare FDMA and TDMA.
SECTION-B
Answer any 5 questins.Each question carries 5 marks each 5X5=25
13.Explain circuit switching and packet switching techniques.
14.Explain TCP/IP architecture.
15.Explain the properties of digital transmission systems.
16.Write the signal waveforms when 1 0 1 1 0 1 is transmitted using line codes-
a) Unipolar NRZ
B)Bipolar
17.Explain single bit parity check and two dimensional parity error detection methods.
18.Explain CSMA/CD Random Access Protocol.
19.Briefly explain peer to peer protocols and service models.
20.Explain the structure of packet switch.
SECTION-C
Answer any 3 questions. Each question carries 15 marks 15 X 3 = 45
21. a) What are the goals of a Computer Network ? 5marks
b) Explain OSI reference model in detail. 10 Marks
22.a)Explain the Characteristics of co-axial cables with neat diagram ?what are the advantages of co-
axial over twisted pair ? 6marks
b)What are polynomial codes ? Explain with an examples. 9marks
23.a)Explain SONET multiplexing with Frame structue. 8marks
b)Explain Selective -Repeat ARQ protocol. 7marks
24.a) Explain the following scheduling schemes
i) Reservation system.
ii)polling. 7marks
b) Explain IEEE 802.3 Ethernet protocol with frame structure. 8marks
25.Write Short notes on :
a) Nyquist signalling rate 5marks
b) MAC sublayer and logical link control sublayer. 5marks
c) Link state routing and distance vector routing. 5marks
Y2K8 SCHEME
COMPUTER SCIENCE
BCA-404:DATA COMMUNICATION AND NETWORKS
TIME:3HOURS MAX.MARKS:90
INSTRUCTION:Answer all the questions
SECTION-A
Answer any 10 questions..Each questin carries 2 marks each. 2X10=20
1.what is protocol ? Give two examples.
2.Define Multiplexing.
3.Expand HTTP. Where it is used ?
4.Mention three types of Switching Techniques.
5.Define Routing.
6.What is the use of TELNET?
7.Define Attenuation.
8.What ar single bit errors and burst errors.
9.What is framing?
10.What is pipelining?
11.What is ALOHA?
12.Compare FDMA and TDMA.
SECTION-B
Answer any 5 questins.Each question carries 5 marks each 5X5=25
13.Explain circuit switching and packet switching techniques.
14.Explain TCP/IP architecture.
15.Explain the properties of digital transmission systems.
16.Write the signal waveforms when 1 0 1 1 0 1 is transmitted using line codes-
a) Unipolar NRZ
B)Bipolar
17.Explain single bit parity check and two dimensional parity error detection methods.
18.Explain CSMA/CD Random Access Protocol.
19.Briefly explain peer to peer protocols and service models.
20.Explain the structure of packet switch.
SECTION-C
Answer any 3 questions. Each question carries 15 marks 15 X 3 = 45
21. a) What are the goals of a Computer Network ? 5marks
b) Explain OSI reference model in detail. 10 Marks
22.a)Explain the Characteristics of co-axial cables with neat diagram ?what are the advantages of co-
axial over twisted pair ? 6marks
b)What are polynomial codes ? Explain with an examples. 9marks
23.a)Explain SONET multiplexing with Frame structue. 8marks
b)Explain Selective -Repeat ARQ protocol. 7marks
24.a) Explain the following scheduling schemes
i) Reservation system.
ii)polling. 7marks
b) Explain IEEE 802.3 Ethernet protocol with frame structure. 8marks
25.Write Short notes on :
a) Nyquist signalling rate 5marks
b) MAC sublayer and logical link control sublayer. 5marks
c) Link state routing and distance vector routing. 5marks
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