End to end arguments in system design
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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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End to end arguments in system design

End-To-End Arguments in System Design

Ayodele Onibokun

Seminar In Networks

Jan. 19th, 2007

Seminar In Networks


Introduction

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


Motivation

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


End to end arguments in system design

  • Which functions belong at which Layer?

  • reliability,

  • routing,

  • encryption,

  • compression,

  • data conversion?

  • - The End-to-End Argument

Seminar In Networks


Illustrated examples

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


Illustrated examples cont d

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


Critiques

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


Bottom line

Bottom-Line

  • Predicting future design concerns

  • Predicting technology progresses

Seminar In Networks


Discussion

Discussion

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