CS536-2009-01-20-end2end

CS536-2009-01-20-end2end - CS536: End to End Argument J....

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CS536: End to End Argument J. Saltzer, D. Reed, and D. Clark, End-to-end Arguments in System Design. ACM Transactions on Computer Systems (TOCS) , Vol. 2, No. 4, pp. 195-206, 1984. Introduction 1-1
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Introduction 1-2 The End-to-End Argument Correctness and completeness are often (usually?) only able to be certified at the highest layer. Ex: Suppose I ask you to read a research paper. Which are sufficient? • [Link Layer] Do nothing. Of course you’ll read the paper, as you do everything the professor asks. • [Network Layer] Check to make sure someone standing near you heard the request. • [Transport Layer] Confirmation you heard my request. • [Presentation Layer] Showing me a copy of the paper. • [Session Layer] Telling me you’ve read the paper. • [Application Layer] Quizzing or testing you on the material covered in the paper.
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Only a complete check of end-to-end requirements is sufficient. Failures may occur at any place Temporary hearing problem Short-term memory loss Printing wrong paper Lazyness in actually reading the paper Reading comprehension Must verify objective is complete! Introduction
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CS536-2009-01-20-end2end - CS536: End to End Argument J....

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