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.
More Networking Protocols and Standards:
• OSPF (Open Shortest Path First) Protocol
• Neighbor Discovery Protocol (NDP)
• Looking at the OSI 7 Layer Reference Model
• Kerberos Authentication Protocol
• IEEE 802 Standards Specify the Basics of Physical and Logical Networking
• OSI Network Model
• X.25 and Frame Relay Overview
• IP Addressing
• Understanding IP Routing
• What Are Private IP Addresses?
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