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: • IPv6 Dynamic Address Allocation • IPv6 Address Auto Configuration • Major Protocols in the TCP/IP Suite • WAN Network Protocols - DSL, SONET, HDLC, DWDM, DLSW+ • Comparison of the Layers of the OSI and TCP/IP Models • TCP/IP Utilities • 14 Common Network Ports You Should Know • Network Routing Protocols - IGRP, EIGRP, OSPF, ISIS, BGP • IPv4 Address Classes • How to Set Up FTP (File Transfer Protocol)
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