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The OSI Presentation Layer

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.

OSI Presentation Layer

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:
• Protocol Suites
• The OSI Data Link Layer
• Internet Security and VPN Network Design
• Network Routing Protocols - IGRP, EIGRP, OSPF, ISIS, BGP
• Networking Protocols, Ports, Standards, and Organizations What Does it All Mean?
• Unicast, Multicast, Broadcast. What Does It Mean?
• Classless IP Addressing
• DSL (Digital Subscriber Line)
• IEEE 802 Standards Specify the Basics of Physical and Logical Networking
• Routing Datagrams

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