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2003 Course Network & Information Security

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Total No. of Questions : 12] [Total No. of Pages : 3 P1289 [3864]-409 B.E. NETWORK AND INFORMATION SECURITY Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Attempt any three questions from Section - I and three questions from Section - II. 2) Figures to the right indicate full marks. 3) Draw neat diagrams wherever necessary. 4) Make suitable assumptions wherever necessary. SECTION - I Q1) a) b) Explain the basic security concepts. How the individual components of the system are identified for analysis. [8] Explain the ISO Security Architecture. [8] OR Q2) a) b) Q3) a) b) What are typical phases of operation of viruses or worms? How do the worms propagate? [8] Explain Man-in-Middle attacks and Reply attacks with suitable example. What are different security measures to control these attacks? [8] Enlist and explain the principles of Public Key Cryptosystem. [8] Enlist and explain three threats associated with user authentication over a network or internet. [8] P.T.O.

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