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: • Remote Control Protocols • Network Operating Systems • How to Set Up FTP (File Transfer Protocol) • IPv4 Datagram Fields • What is PPP, PPPoA and PPPoE? • Video - Transport Layer (Layer 4) of OSI Networking Model • OSPF (Open Shortest Path First) Protocol • The OSI Reference Model • Neighbor Discovery Protocol (NDP) • The OSI Presentation Layer
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