COMPUTER COMMUNICATION AND NETWORKS-MARCH-2010

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

COMPUTER COMMUNICATION AND NETWORKS

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Define spectrum of a signal.

2.Define Wan.

3.What is mean by EIA 232?

4.Define bit rate and baud rate.

5.What are S frame?

6.Define flow control.

7.Define token ring.

8.List the benefits of ATM.

9.State two responsibilities of session layer.

10.What is cryptography?

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  (a)Distinguish between analog and digital data transmission.(6)

          (b)Name different toplogies.(6)

OR

v  Explain briefly the ISo-OSI model with the help of a block diagram.(12)

Unit-2

v  Describe guided and unguided media.(12)

         

OR

v  (a)Write notes on terrestrial microwave communication and satellite communication.(6)

          (b)Explain frequency division multiplexing.(6)

UNIT-3

v  (a)Explain ARQ techniques for dealing errors.(6)

          (b)Write short note on asynchronous protocols.(6)

OR

v  Explain HDLC.(12)

UNIT-4

v  Explain ISDN.(12)

OR

v  (a)Explain Leaky bucket algorithm.(6)

          (b)Explain Time-division switches.(6)

UNIT-5

v  Explain different types of bridges.(12)

OR

v  Explain DNS.(12)

        

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