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Critique Of Osi Model-Data Communication-Lecture Notes

Lecture Notes, Data Communication

Post: August 4th, 2012
Description
Data Communication is exchange of data between two devices. In computers data exchange is in form of 0 and 1. This course discuss how computer communicate, what is medium and what are expenses. This handout includes: Critique, Osi, Model, Widespread, Implementations, Empty, Presentation, Apocalype, Standards
Data Communication is exchange of data between two devices. In computers data exchange is in form of 0 and 1. This course discuss how computer communicate, what is medium and what are expenses. This handout includes: Critique, Osi, Model, Widespread, Implementations, Empty, Presentation, Apocalype, Standards
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Contents
LECTURE # 8 Critique of OSI Model Reasoning for OSI not getting Widespread ¾ Bad Timing(slide) (Apocalypse of Two Elephants) –David Clarke of MIT –If standards are written too early: subject is badly understood and bad standards –If standards are written too late so many companies may have already made investments in doing the same thing with different other ways ¾ Bad Technology –Flow control, error control, addressing is multiple –Session and Presentation(EMPTY), Network and DL(Full) ¾ Bad Implementations Apocalypse of Two Elephants ™ Physical (Layer 1) o Coordinates the functions required to transmit a bit stream over a physical medium o Deals with mechanical and electrical specifications of Tx. Medium and Interface o Also defines procedures and functions that physical devices and interfaces need to perform for TX. To occur (Figure) docsity.com Figure x Functions of Physical Layer o Physical Characteristics of Interface & Media ¾ Defines characteristics of Int..

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