翻訳と辞書
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・ open shortest-path first
・ open shortest-path first interior gateway protocol
・ open software foundation
・ open source
・ open source definition
・ open source initiative
・ open source license
・ open switch
・ open system architecture
・ open systems interconnect
・ open systems interconnection
・ open telecom platform
・ open trading protocol
・ open university
・ open-collar worker
・ open/closed principle
・ openbsd
・ opendoc
・ opendocument
・ opengl


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Open Systems Interconnection : FOLDOC
Open Systems Interconnection
(OSI-RM, OSI Reference Model, seven layer model) A model of network architecture and a suite of protocols (a protocol stack) to implement it, developed by ISO in 1978 as a framework for international standards in heterogeneous computer network architecture.
The OSI architecture is split between seven {layers}, from lowest to highest: 1 physical layer, 2 data link layer, 3 network layer, 4 transport layer, 5 session layer, 6 presentation layer, 7 application layer.
Each layer uses the layer immediately below it and provides a service to the layer above. In some implementations a layer may itself be composed of sub-layers.
OSI is the umbrella name for a series of non-proprietary protocols and specifications, comprising, among others, the OSI Reference Model, ASN.1 (Abstract Syntax Notation 1), BER (Basic Encoding Rules), CMIP and CMIS (Common Management Information Protocol


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