COMPUTER COMMUNICATION AND NETWORKS-MARCH-2008

FOURTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-MARCH, 2008

COMPUTER COMMUNICATION AND NETWORKS

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Define full-duplex communication.

2.Define signal.

3.Define unipolar encoding.

4.Define multiplexing.

5.Define flow control.

6.Define hamming code.

7.Write the IEEE standard for Token Bus.

8.List the ISDN channels.

9.What is URL?

10.What is SNMP?

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  Explain different network topologies.(12)

OR

v  (a)Write a note on analog data and digital data.(6)

(b)Write a note on WAN.(6)

Unit-2

v  Write a note on PCM.

         

OR

v  Write a note on NRZ,Manchester and Differential Manchester encoding.(12)

UNIT-3

v  (a)Write a note on the operation of HDLC.(6)

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

OR

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

          (b)Write a note on go-back-n ARQ.(6)

UNIT-4

v  Write a note on IEEE 802.5 standard,token ring.(12)

OR

v  Write a note on frame relay architecture,layers and frame relay format.(12)

UNIT-5

v  Write a note on shortest path routing with an example.(12)

OR

v  (a)Write a note on subnetting.(6)

(b)Write a note on simple network management protocol.(6)

        

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