Chapter 6: Presentation Layer

• What is the presentation layer?
• Layer 6
• Receives information from the application layer protocol and puts it in a format all computers following the OSI model can understand.
• This layer allows a common representation of data in a structure that can be properly process by the end system.
• Example:
• If a someone creates a Word document and sends it out to different individuals, it does not matter if the receiving computer has different world processing programs. The different computers will be able to receive the files, understand it, and present it to its user as a document. 
• The presentation layer does not care about the meaning of the data, but rather the syntax and format of the data.
• It's a translator layer that formats an application to a standard format used for passing messages over network. 
• This layer also handles data compression and encryption issues.
• No protocols work in this later.
• Network services work at this layer.