1 Scope and Field of Application
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# 1 Scope and Field of Application

The Communication Protocols specified in this part of PS 3 closely fit the ISO Open Systems Interconnection Basic Reference Model (ISO 7498-1, see Figure 1-1). They relate to the following layers: Physical, Data Link, Network, Transport, Session, Presentation and the Association Control Services (ACSE) of the Application layer. The communication protocols specified by this part are general purpose communication protocols (TCP/IP) and not specific to this standard. The other aspects of the Application Layer protocols are addressed in other parts of this standard as discussed in PS3.1 “PS3.1”.

Figure 1-1. ISO OSI Basic Reference Model

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