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IGNOU UNIVERSITY MCA - II (SEM 4) JUN 2009 : Data Communication and Computer Networks

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MCA (Revised) ro Term-End Examination bD june, 2 009 l.n) MCS-042: D ATA C OMMUNICATION A ND COMPUTER N ETWORKS Time : 3 h ours Note : 1. Maximum M arks : 1 00 n Q uestion umber1 .i s c ompulsory.A ttempt a ny t htee questions f to* t he r est. - ( u) W hat i s t he d ifference b etween a p ort 3 +2 address,a l ogical a ddress a nd a p hysical address,w hich t ype o f a ddress c hanges from hop to hop. (b) A ssume w e n eed t o d ownload a t ext document a t t he r ate o f 1 000 P ageso f s ize 24 r ows w ith 2 5 c haracters p er r ow i n a 5 i page p er m inute. \ uVhats t he r equired b it rate of the channel ? (c) C alculate c hannel c apacity f or a t elephone line w hich n ormally h as a b andwidth o f 300 t o 3 300 H z. T he S /N t s 3 \62. I n c ase we h ave t o t ransfer d ata w ith h igh r ate, 5 what i s r equired t o b e d one ? MCS-042 P.T.O.

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Additional Info : Mca - II (sem 4) June 2009 Question Paper - Data Communication and Computer Networks(Revised Course)
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