ISDS 406 Homework 5

Asra Fathima
ISDS 406 – Summer 2017
Homework #5
Chapter 7

Explain the distinctions between time and arrangements, fixed-price, and value-added outsourcing contracts. What are the pros and cons of each?
Assume that you are developing a new system for a local real estate agency. The agency wants to keep a database of its own property listing and also wants to have access to the citywide multiple listings service used by all real estate agents. Which design strategy would you recommend for the construction of this system? Why?

Chapter 8

What is meant by the term scalable? What is its importance in architecture selection?
Explain the difference between a symmetric encryption algorithm and an asymmetric encryption algorithm.
What is meant by authentication? What is its role in securing transactions?

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