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Why we starting using OSI model

I want a help for NCCeducation course

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  • Ben Wabnick
    Ben Wabnick May 11, 2010

    What kind of help do you need with the NCCeducation course?

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He probably needs an answer to the topic question for his studies.

ANSWER: The reason we started using it was to enable network communication between the various networking hardware products of various producers without it mattering which one was produced by who and on what platform. This is possible because the OSI model is a standardisation (ISO 7498-1) which lists the various functions provided by different network protocols into layers on top of each other in a way that the layers above each other can only use functions provided by a sub-layer and can only provide functions for a superior layer. The model clearly specifys how one layer can interact with the other. (this by the way is what we call RFC -- Request for Comments) This way a software of the layer written by one producer could cooperate/communicate with the software of a layer written by a different producer even on two different platforms.

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Posted on Feb 09, 2009

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4 Answers

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A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment. Logically, MAC addresses are used in the Media Access Control protocol sub-layer of the OSI reference model.

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1 Answer

What is osi model


The 7 Layers of the OSI Model
Last updated: March 03, 2008
The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station, proceeding to the bottom layer, over the channel to the next station and back up the hierarchy.
Application
(Layer 7)
This layer supports application and end-user processes. Communication partners are identified, quality of service is identified, user authentication and privacy are considered, and any constraints on data syntax are identified. Everything at this layer is application-specific. This layer provides application services for file transfers, e-mail, and other network software services. Telnet and FTP are applications that exist entirely in the application level. Tiered application architectures are part of this layer.
Presentation
(Layer 6)
This layer provides independence from differences in data representation (e.g., encryption) by translating from application to network format, and vice versa. The presentation layer works to transform data into the form that the application layer can accept. This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems. It is sometimes called the syntax layer.
Session
(Layer 5)
This layer establishes, manages and terminates connections between applications. The session layer sets up, coordinates, and terminates conversations, exchanges, and dialogues between the applications at each end. It deals with session and connection coordination.
Transport
(Layer 4)
This layer provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. It ensures complete data transfer.
Network
(Layer 3)
This layer provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.
Data Link
(Layer 2)
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Physical
(Layer 1)
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For further details go to:

http://en.wikipedia.org/wiki/OSI_model

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Hi,

After this posting when you view this again, you would be asked Still need a solution for this problem? Try our Premium Assistance plan

Thereafter, you would have a choice:
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Your choice of course.

Initially, may I suggest that the sound device in Device Managers be checked and verified to have all the drivers installed and no yellow or red marks.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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1 Answer

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1 Answer

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Hey, why'd you call it a generic desktop problem when you had the WD MyBook model info and everything? Nobody else can use problems and solutions that don't have specs on 'em....

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1 Answer

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Hi,

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Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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