OSI defines five classes of connection-mode transport protocols ranging from class 0 (which is also known as TP0 and provides the fewest features) to class 4 (TP4, designed for less reliable networks, similar to the Internet). Transmission and reception of raw bit streams over a physical medium Reliable transmission of data frames between two nodes connected by a physical layer Structuring and managing a multi-node network, including addressing, routing and traffic control Reliable transmission of data segments between points on a network, including segmentation, acknowledgement and multiplexing continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes Translation of data between a networking service and an application including character encoding, data compression and encryption/decryption High-level APIs, including resource sharing, remote file access Layer 1 is the lowest layer in this model. The recommendation X.200 describes seven layers, labeled 1 to 7. STANDARD ISO 7498-2 First edition Information processing Systems - Open Systems Interconnection - Basic Reference Model - Part 2: Security Architecture S ystkmes de traitement de rinformation - lnterconnexion de s yst&mes ouverts - Modele de rdfkrence de base - Partie 2: Architecture de s&urit& Reference number ISO 7498-2: 1989 (El ISO 7488-2: 1989 (EI Foreword. This multi- partite standard defines the OSI reference model, describing an architecture to secure network communications through security services (access control, authentication, data integrity, data confidentiality and non. 8 Open Systems Interconnect (OSI) security model.
Iso 7498 2 Security Architecture Principles.
The OSI security architecture reference model (ISO 7498-2) is also designed around seven layers, reflecting a high level view of the different requirements within network security. The OSI reference model for networking (ISO 7498-1) is designed around seven layers arranged in a stack. Extends the field of application of ISO 7498. Provides a general description of security services and related mechanisms, which can be ensured by the Reference Model, and of the positions within the Reference Model where the services and mechanisms may be provided.
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