COMPUTER COMMUNICATION AND NETWORKS-OCTOBER-2010

FOURTH  SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-OCTOBER, 2010

COMPUTER COMMUNICATION AND NETWORKS

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Define bandwidth of a signal.

2.What are protocols and standards?

3.What is multiplexing?

4.Name two different light sources used in fiber optic system.

5.What are U frames?

6.Define single bit error.

7.List the benefits of ATM.

8.Write the characteristics of LAN.

9.What is POP?

10.What are NVT?

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  Explain briefly different topologies.(12)

OR

v  Distinguish between analog and digital data transmission.(12)

Unit-2

v  (a)Explain Manchester encoding and NRZ.(6)

(b)Describe Nyquist bandwidth.(6)

         

OR

v  (a)Explain cable modem.(6)

          (b)Describe time division multiplexing.(6)

UNIT-3

v  (a)Explain asynchronous protocols.(8)

          (b)Write any four general features of HDLC.(4)

OR

v  Explain error control in detail.(12)

UNIT-4

v  (a)Explain packet switching.(6)

v  (b)Write advantages of ATM.(6)

OR

v  (a)Explain frame relay.(6)

          (b)Compare datagram and virtual circuit.(6)

UNIT-5

v  Explain Dijikstra algorithm.(12)

OR

v  Explain data compression.(12)     

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