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End-To-End Arguments in System Design

End-To-End Arguments in System Design. Ayodele Onibokun Seminar In Networks Jan. 19 th , 2007. Introduction. End-To-End Argument (E2E) Sets of design principles Helps in proper placement of functions Placing functions at higher levels in a layered design

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End-To-End Arguments in System Design

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  1. End-To-End Arguments in System Design Ayodele Onibokun Seminar In Networks Jan. 19th, 2007 Seminar In Networks

  2. Introduction End-To-End Argument (E2E) • Sets of design principles • Helps in proper placement of functions • Placing functions at higher levels in a layered design • More closer to the application (especially in communication networks) Seminar In Networks

  3. Motivation? • Observations:  No new solutions  Existing trends and comment on further implications • Then AND Now  Current Internet Scenario • New and different application requirements Seminar In Networks

  4. Which functions belong at which Layer? • reliability, • routing, • encryption, • compression, • data conversion? • - The End-to-End Argument Seminar In Networks

  5. Illustrated Examples Careful File-Transfer (CFT) Possible threats to CFT (independent of network communications) Storage disk error / hardware fault  Buffer errors in FTP client  Soft error  Bit change (in packet transmission) The Argument: FTP Client should have built-in reliability • Operating System Error • Software Engineering Errors Seminar In Networks

  6. Illustrated Examples (Cont’d) Delivery Guarantees Acceptability & responsibility of message received The Argument: E2E ACK may still be a requirement Secure transmission of data  e.g. Skype,  WEP, WPA  Router  IPSEC, PGP Other Examples Seminar In Networks

  7. Critiques Advantages: Ensures proper guidance in system design Ensures proper placement of functions Some of the arguments are convincing Disadvantages:  Different application requirements  Exponential growth of the Internet  Does not take into account technological advances Seminar In Networks

  8. Bottom-Line • Predicting future design concerns • Predicting technology progresses Seminar In Networks

  9. Discussion Comments Seminar In Networks

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