COMPUTER COMMUNICATION AND NETWORKS-MARCH-2009

FOURTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-MARCH, 2009

COMPUTER COMMUNICATION AND NETWORKS

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Define spectrum.

2.Define digital data.

3.Define baud rate.

4.Define attenuation.

5.Define hamming distance.

6.Define parity check.

7.Write the IEEE standard for Ethernet.

8.List the layers on which frame relay operates.

9.Define a repeater.

10.Define client server model.

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  (a)Write a note on analog signals and digital signals with suitable diagrams.(6)

          (b)Write a note on point-to-point configuration and multi-point configuration.(6)

OR

v  (a)Write a note on transmission modes with examples.(6)

(b).Write a note on guided and unguided transmission media with examples.(6)

Unit-2

v  Write a note on optical fibre.(12)

OR

v  Write a note on synchronous time division multiplexing.

UNIT-3

v  (a)Write a note on selective-reject ARQ.(6)

          (b)Write a note on bit stuffing.(6)

OR

v  (a)Write a note on stop-and-wait ARQ.(6)

          (b)Write a note on character oriented protocol.(6)

UNIT-4

v  (a)Write a note on IEEE 802.3 standard,Ethernet.(6)

(b)List the features of frame relay network.(6)

OR

v  (a)Write a note on IEEE 802.4  standard,token bus.(6)

          (b)Write a note on LLC.(6)

UNIT-5

v  (a)List the properties that are desirable in a routing algorithm.(6)

          (b)Compare TCP/IP and OSI.(6)

OR

v  Write a note on repeaters,routers and gateways.(12)

        

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