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IGNOU UNIVERSITY MCA - II (SEM 4) DEC 2008 : Data Communication and Computer Networks

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MCA (Revised) Term-End Examination December, 2 OO8 MCS-042 D ATA C OMMUNICATIONND : A COMPUTER ETWORKS N T i m e: 3 h o u r s Note : 1. MaximumM arks: 7 00 Q uestion n umber 7 i s c ompulsory. A ttempt any t hree q uestionsf rom t he r est. ( a) A ssume a b inary s ignal i s s ent o ver a 8 K Hz channel, w here S /N R atio i s 2 0 d B. C an i t carry 48 kbps data rate ? Show relevant calculations. (b) Show t he c onstellation iagram o f Q PSK. d (c) Find C RC f or t he d ata p olynomial *9 + * 7 + * 3 + * 2 + 1 w ith g enerator p o l y n o m ix 3 + x + 1 . al MCS-042 P.T.O.

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Additional Info : Mca - II (sem 4) December 2008 Question Paper - Data Communication and Computer Networks(Revised Course)
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