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:
• The OSI Network Layer
• Basic TCP/IP Networking
• Network Switches
• IPv6 Global Unicast Addresses
• PoE (Power Over Ethernet)
• Networking Routing Believability and Administrative Distance
• Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Routing Convergence
• Shortest Path Bridging (SPB) Protocol
• IPv6 Flow Label Field
• Major Protocols in the TCP/IP Suite
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