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: • A Simple Description of the IPv6 Header and Datagram • Basic TCP/IP Networking • T-Carrier - A Complete and Comprehensive Guide • TCP/IP Utilities • IEEE 802.11 Wireless Modulation Methods • OSI Transport Layer • Session Border Controllers - More Than Just a Voice Firewall • Networking Routing Believability and Administrative Distance • Video - Transport Layer (Layer 4) of OSI Networking Model • Shortest Path Bridging (SPB) Protocol
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