The Presentation Control Layer

The Presentation Control Layer is a part of the OSI Reference Model. It is the second Layer from the top.  This Layer provides services to the Application/User Layer that lies above. 

The presentations to the Application/User Layer are controlled by the Presentation Control Layer.

Exchange of information occurs between the Application/User Layer and the Presentation Control Layer. The Application/User Layer requires to be supported with  suitable Data. The Presentation Control Layer supports the Application/User Layer to perform interpretation of Data.

The support required by the Application/User Layer to perform interpretation arises because of different forms of Data. 

Yes, a piece of Data can be represented in various ways. The various forms of Data present a variety of Data before us.

It is to mention that the Application/User Layer is presented with Computer Program and Data. The Presentation Control Layer is responsible for these presentations.

Computer Program makes use of Data to provide results. These results are needed by the Network user. It is the Network user who came to the Application/User Layer to meet his requirements.

The Presentation Control Layer bridges the gap between Computer Programs and Data. A Computer may be unable to understand a particular form of Data. If required, the Presentation Control Layer converts the Data to a form that is understandable. 

Actually Data ( to be presented to a Computer Program) can be coded in different ways. If the coding style of Data is not in agreement with a Computer Program, such Data is useless. The Computer Program cannot move forward with such presented Data. 

It is the responsibility of the Presentation Control Layer to present Data that is suitably coded. This suitable form of Data is presented to the Computer Program that has come to Application/User Layer.

The Application/User Layer expresses its requirement. This requirement is fulfilled by making a presentation. The composition of the presentation is made suitable by the Presentation Control Layer. 

We can say that the Presentation Control Layer makes suitable modifications to  Data. Such modifications are very important. These modifications are valued by the Application/User Layer.

The Presentation Control Layer helps Computer Programs to be fed with suitable Data. The different forms of Data is due to differences in Computer Hardware.