CONTENTS

 1     Scope
 2     Definitions
 3     Notation
 4     Introduction to Open Systems Interconnection (OSI)
        4.1     Definitions
        4.2     Open System Interconnection Environment
        4.3     Modelling the OSI Environment
 5     Concepts of a layered architecture
        5.1     Introduction
        5.2     Principles of layering
        5.3     Communication between peer-entities
        5.4     Identifiers
        5.5     Properties of service-access-points
        5.6     Data-units
        5.7     The nature of the (N)-service
        5.8     Elements of layer operation
        5.9     Routing
       5.10     Quality Of Service (QOS)
 6     Introduction to the specific OSI layers
        6.1     Specific layers
        6.2     The principles used to determine the seven layers in the Reference Model
        6.3     Layer descriptions
        6.4     Combinations of connection-mode and connectionless-mode
        6.5     Configurations of OSI Open Systems
 7     Detailed description of the resulting OSI architecture
        7.1     Application Layer
        7.2     Presentation Layer
        7.3     Session Layer
        7.4     Transport Layer
        7.5     Network Layer
        7.6     Data Link Layer
        7.7     Physical Layer
 8     Management aspects of OSI
        8.1     Definitions
        8.2     Introduction
        8.3     Categories of management activities
        8.4     Principles for positioning management functions
 9     Compliance and Consistency with this reference model
        9.1     Definitions
        9.2     Application of consistency and compliance requirements
Annex  A  –  Brief explanation of how the layers were chosen
Annex  B  –  Alphabetical index to definitions