.The Open Systems Interconnection model ( OSI model) is a that characterizes and standardizes the communication functions of a or computing system without regard to its underlying internal structure and technology. Its goal is the interoperability of diverse communication systems with standard.
The model partitions a communication system into. The original version of the model had seven layers.A layer serves the layer above it and is served by the layer below it. For example, a layer that provides error-free communications across a network provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that constitute the contents of that path. Two instances at the same layer are visualized as connected by a horizontal connection in that layer.The model is a product of the Open Systems Interconnection project at the (ISO).Comparison with TCP/IP model The design of protocols in the of the Internet does not concern itself with strict hierarchical encapsulation and layering. Contains a section entitled 'Layering '.
IEEE Spectrum. March 2017. J. IEEE Computer Society.
Iso 7498 2 Security Architecture And Design Software
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^, Computer Networks, § 1.4.4.External links Wikimedia Commons has media related to. ( inside ) (requires in order to accept licence agreement). The ISO OSI Reference Model, Beluga graph of data units and groups of layers.
Archived from on 26 May 2012. CS1 maint: others. Zimmermann, Hubert (April 1980). 'OSI Reference Model — The ISO Model of Architecture for Open Systems Interconnection'. IEEE Transactions on Communications. 28 (4): 425–432.
Most recent ISO 7498-2:1989 Information processing systems - Open Systems Interconnection - Basic Reference Model - Part 2: Security ArchitectureProvides 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. Extends the field of application of ISO 7498 to cover secure communications between open systems.
Adds to the concepts and principles included in ISO 7498 but does not modify them. Is no implementation specification, nor a basis for assessing the conformance of actual implementations.
Iso 7498-2 Pdf
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Scope and field of applicationThis part of ISO 7498:a) provides a general description of security services and related mechanisms, which may be provided by the Reference Model; andb) defines the positions within the Reference Model where the services and mechanisms may be provided.This part of ISO 7498 extends the field of application of ISO 7498, to cover secure communications between open systems.Basic security services and mechanisms and their appropriate placement have been identified for all layers of the Basic Reference Model. In addition, the architectural relationships of the security services and mechanisms to the Basic Reference Model have been identified. Additional security measures may be needed in endsystems, installations and organizations.
These measures apply in various application contexts. The definition of security services needed to support such additional security measures is outside the scope of this standard.OSI security functions are concerned only with those visible aspects of a communications path which permit end systems to achieve the secure transfer of information between them. OSI Security is not concerned with security measures needed in end systems, installations, and organizations, except where these have implications on the choice and position of security services visible in OSI. These latter aspects of security may be standardized but not within the scope of OSI standards.This part of ISO 7498 adds to the concepts and principles defined in ISO 7498; it does not modify them. It is not an implementation specification, nor is it a basis for appraising the conformance of actual implementations.
This article may be to readers. Please help us. There might be a discussion about this on. ( January 2012) Security controls are safeguards or to avoid, detect, counteract, or minimize to physical property, information, computer systems, or other assets.They can be classified by several criteria.
For example, according to the time that they act, relative to a security incident:. Before the event, preventive controls are intended to prevent an incident from occurring e.g.
By locking out unauthorized intruders;. During the event, detective controls are intended to identify and characterize an incident in progress e.g. By sounding the intruder alarm and alerting the security guards or police;. After the event, corrective controls are intended to limit the extent of any damage caused by the incident e.g. By recovering the organization to normal working status as efficiently as possible.According to their nature, for example:. Physical controls e.g. Fences, doors, locks and fire extinguishers;.
Procedural controls e.g. Incident response processes, management oversight, security awareness and training;. Technical controls e.g. User authentication (login) and logical access controls, antivirus software, firewalls;. Legal and regulatory or compliance controls e.g.
Privacy laws, policies and clauses.A similar categorization distinguishes control involving people, technology and operations/processes.In the field of, such controls protect the confidentiality, integrity and/or availability of information - the so-calledSystems of controls can be referred to as frameworks or standards. Frameworks can enable an organization to manage security controls across different types of assets with consistency. Contents.Information security standards and control frameworks Numerous information security standards promote good security practices and define frameworks or systems to structure the analysis and design for managing information security controls.
Security Architecture Models
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. Extends the field of application of ISO 7498 to cover secure communications between open systems.
Adds to the concepts and principles included in ISO 7498 but does not modify them. Is no implementation specification, nor a basis for assessing the conformance of actual implementations.General information.