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How OSI works.

Seb Nico

on 1 May 2009

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Transcript of OSI

OSI Models

Layers Physical-is the most basic layer of the model. It consists of the cable abd adapter cards. It determines how electrical signals are carried between the devices on a network.

Data-describes the networks level of operation at which the raw data is packaged for transfer from one network card to another.

Network-is resposible for routing packets of data from one card to another across a large network.

Transport-it ensures the data received from a transmission is reliable. It sequences the packets of data and reassembles them into correct order.

Session-the layer in which a connection is established between two different computers. Provides system security based on machine and user name recognition.

Presentation-ensures character code recognition. Responsible for converting the chraracter codes from the originating to another form that can be recognized by by the recieving computer.

Application-Manages network procceces such as file transfer, mail service, and file server database access. How OSI Models Work The core of this standard is the OSI Reference Model, a set of seven layers that define the different stages that data must go through to travel from one device to another over a network. At each layer, certain things happen to the data that prepare it for the next layer.
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