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:
• Video - Data Link Layer of OSI Networking Model
• TCP/IP Protocol Suite
• IPv6 Flow Label Field
• Routing Datagrams
• Dynamic Host Configuration Protocol (DHCP) Explained
• Networking Routing Believability and Administrative Distance
• Kerberos Authentication Protocol
• Networking and Internet Standards Organizations
• Network Switches
• Remote Control Protocols

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