Bangalore University 2009 Diploma Computer Engineering Technical board of education in computer science department - Question Paper

tech. Board of education
Computer science Department-2009
third Semester
Data Communication and Computer Network
Section-1
1.A.Fill in the blanks

1.The process of having a base band signal to replace a different high frequency signal is…………………….
2………………..is the process of transmitting multiple signals over a single communication channel.
3……………….Flow control sends multiple frames at as time.
4………………are devices that transfer data on the identical logical network.
5………………Base-T is called an Ethernet.
B. discuss the features of mesh and hybrid topologies
Section-B

1.With improper block diagram, discuss the operation of a transmitter and receiver.
2.Explain the need for modulation and demodulation .
3.Define the terms
A.Bandwidth
B.Channel capacity
C.Baud rate
4.Explain with figure,the process of time division multiplexing
5.Mention the 3 kinds of radio wave propagation and discuss any one
6.Write a note on sampling theorem
Section-C

1.Explain the parity check and CRC fault detecting methods with examples
2.Explain the construction of a fibre optic cable and provide the classification of fibre optic cable. discuss them briefly
3.Explain with figure,the operation of"sliding windows" flow control"
4. discuss the subsequent terms
A.Internet&intranet
B.Interfaces&services
5.What is congestion in computer network? How to overcome it.
Section-D

1.Explain with Figure the star topology. elaborate its advantages and disadvantages
2.Campare CDMA and TDMA
3.Explain the concept of circuit switching
4.What do you mean by hierarchical naming
5.Write a note on NSAP address format
6.What is the need for subnet mask

Earning:   Approval pending.