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OSI Upper Layers
Jul 05,2008 00:00
by
admin
OSI Upper Layers
The upper OSI layers provide application level support such as
the user interface, data formatting, and communication sessions. The upper
layers are as follows:
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Application— The layer where
applications and users interface with the network. Examples include web
browsers, electronic mail, or a word processing program.
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Presentation— The layer that
controls format translation and provides data encryption and compression.
Examples include ASCII and JPEG.
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Session— The layer responsible
for establishing, maintaining, and terminating sessions between presentation
layer entities. Protocols that fall at this layer include NetBIOS and RPC.
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