OSI communication with windows Application

I would like to create a cheat - sheet of mapping the transport of an application from one machine to another - The application is a windows server/ client application with the server communication via PGM multicast protocol and Server client also communicate via TCP.

1.How does the Applicatoin layer speak to windows applications ? Are there different methods or modules that  do this?

2.Do all windows applications have a specific type of messaging layer that communicates with the Application layer? I was wondering exactly how the application speaks to the application layer. I am not a developer and hoping I can get the methods that the above is done in simplistic terms.

Thanks

halcyoneAsked:
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ChipM0nk JGLeaderCommented:
1.

tdi.sys is the general MS Transport Driver Wrapper

built on this are:
tdtcp.sys is the Microsoft TCP Transport Driver
which provides services to the:
tcpip.sys is the Microsoft TCP/IP Driver
tcpip6.sys is the Microsoft IPv6 Driver

You can find all of them in your windows\system32\drivers directory.

2. You will find more than you ever cared to know about how to develop network applications for Windows at:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/network/hh/network/nethdr_03304cfe-7d16-4df9-9ddb-2204d1615044.xml.asp

A good place to start for the TDI layer would be this page (complete with the simplistic diagram that you are searching for):

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/network/hh/network/102gen_2a86b46a-2a2e-4abf-a631-beec58059698.xml.asp

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halcyoneAuthor Commented:
Thanks for you help - I never had any idea about this before, now I do.
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