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The OSI Presentation Layer
By Stephen Bucaro
At the presentaion layer, layer six of the OSI model,source and destination applications
communicate on a format for exchanging data. The sending computer may convert text to a
generic format ( ASCII) for transmission over a network. The receiveing computer converts
the ASCII to the format required by the destination application.
Data Transformation Services Provided by the Presentation Layer
 Text format conversions
Binary and graphics format conversions
Compression and expansion
Encryption and decryption
When you think of the Application layer, keep in mind that the OSI is only a model.
Actual network operating systems may handle the data conversion functions at the application
and session layers.
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