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:
• TCP/IP Features
• IPv6 Packet Fragmentation
• Comparison of the Layers of the OSI and TCP/IP Models
• Network Switches
• VTP (VLAN Trunking Protocol)
• IEEE 802.11.x Wireless Standards
• Shortest Path Bridging (SPB) Protocol
• Unicast, Multicast, Broadcast. What Does It Mean?
• Integration of IPv6 with IPv4
• IPv6 Prefix Length Notation

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