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 Global Unicast Addresses
• NTP Server Systems - The Network Time Protocol
• Video - The Upper Layers 5 Through 7 of the OSI Networking Model
• Network Operating Systems
• IPv4 Datagram Fields
• What is PPP, PPPoA and PPPoE?
• T-Carrier - A Complete and Comprehensive Guide
• Wireless Standards - 802.11a 802.11b 802.11g 802.11n 802.11i Explained
• Internet Protocol versions IPv4, IPv5 and IPv6
• Comparison of the Layers of the OSI and TCP/IP Models

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