Final_Exam_Fall2008

Final_Exam_Fall2008 - ITEC 620 - INFORMATION TECHNOLOGY...

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ITEC 620 - INFORMATION TECHNOLOGY INFRASTRUCTURE Final Exam 1. This is an open-book individual examination. You may use any resources in addition to the textbook, such as other books, articles and the Web. Some questions may require research beyond the text, lecture notes, and conferences. You must, however, do your own work and you may not collaborate with your classmates. Make sure you use the suggested evaluation criteria to search Internet (authority, accuracy, objectivity , currency and coverage) http://www.umuc.edu/library/guides/web.shtml . 2. Questions should be answered in your own words, answering only what you are asked. Use quotation marks if not using your own words, and do not forget to cite full reference . Remember to show your work. 3. Adequate answers for the entire examination should not exceed ten double-spaced pages (not much more) with one-inch margins and 12-point font. 4. Answers will be evaluated on the following criteria: key content, logical flow, and clarity. 5. Post your answers (marked as "Final Exam" and with your name) to your Assignments Folder in WebTycho by 11:59 p.m. Eastern Time, Tuesday, December 2, 2008. PROBLEM I (20 points) The Internet, if viewed from a global client/server perspective, generally consists of web server and their associated databases and other data repositories on the server side and various web browser applications and associated plug-ins on the client side. Is a system of this sort best described as vertically distributed application processing, horizontally distributed application processing, or some hybrid of these two characterizations? We recognize horizontal distribution as one application that is replicated on a number of machines or a number of different applications distributed across a number of computers. Stallings provides a great example of horizontal distribution on page 58 of our textbook. Office automation support systems, the support staff of an organization have their own person computers that reside on a network that connects all the computers. However, each local machine has all the necessary software installed so work is performed locally but files can be shared if needed. Therefore, the computers in the support staff have a peer relationship and there is no client/server relationship. Vertical distribution has one application split up into components dispersed across various machines. Stallings provides three examples – Insurance, Retail chain,
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and Process Control – for vertical distribution. This type of distribution will have a central computer system with various satellite systems set up in a hierarchical fashion. The advantage here is to allow each level to complete its task; hence the processing load is handled by the hierarchy. Stallings notes that this “arrangement combines some of the best features of both centralized and distributed data processing. The Internet is a hybrid of these two types of distributed application processing.
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Final_Exam_Fall2008 - ITEC 620 - INFORMATION TECHNOLOGY...

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