Friday, January 8, 2010

In the upper layers, Internet protocols do not provide the services specified by the layer 5 & 6 in OSI model.

Other OSI services missing from Internet protocols include: direction control, check point control and synchronization, dialogue/activity control, recovery, syntax manipulation, and application context. Does this mean that the Internet implementors are left to handle these functions in a different way as part of the application protocols?In the upper layers, Internet protocols do not provide the services specified by the layer 5 %26amp; 6 in OSI model.
I'm not sure where you got the information in your question about the OSI services in question. In my studies, and when I taught introductory networking, TCP/IP is the one widely adopted protocol that, either inherently or with added services adopted as part of the spec, maps to all layers of the OSI model except physical. If you could identify where those services match to layers in the OSI model it would be helpful.

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