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PUNJAB TECHNICAL UNIVERSITY MCA - I (SEM 2) MAY 2008 : Data Communication and Computer Networks

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Roll No. ........................... Total No. of Questions : 13] [Total No. of Pages : 03 Paper ID [A0508] (Please fill this Paper ID in OMR Sheet) MCA (203) (S05) (O) (Sem. - 2nd) DATA COMMUNICATION AND COMPUTER NETWORKS Time : 03 Hours Maximum Marks : 75 Instruction to Candidates: 1) Section - A is Compulsory. 2) Attempt any Nine questions from Section - B. Section - A Q1) (15 2 = 30) a) What is the difference between synchronous and asynchronous signals? b) How is interference avoided by using FDM? c) How is redundancy related to error detection and correction? d) Explain the difference between Telephone and leased line communication channels. e) Give examples of where star and ring topologies will be useful. f) What is the role of CSMA/CD Protocol? g) Why we need network reference models? h) Why we need multiplexing in communication channels? i) Differentiate between pure Aloha and slotted Aloha. j) What are important characteristics of STDM? k) How leaky bucket algorithm is different from token bucket algorithm? l) List the major design issues at transport layer level. m) Why network standardization is too important in today s world? n) How fourier analysis is important in data communication? o) Differentiate between STP & UTP Cable media. D - 337 P.T.O.

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Additional Info : Mca - I (sem 2) May 2008 Question Paper - Data Communication and Computer Networks
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