GB T 12453-2008 信息技术 开放系统互连 运输服务定义.PDF

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1、This Recommendation | International Standard defines in an abstract way the externally visible service provided by the OSI Transport Layer in terms of:a)the primitive actions and events of the service;b)the parameter data associated with each primitive action and event;c)the relationship between, an

2、d the valid sequences of, these actions and events.The service defined in this Recommendation | International Standard is that which is provided by all OSI Transport Protocols (in conjunction with the Network Service) and which may be used by any OSI Session Protocol.This Recommendation | Internatio

3、nal Standard does not specify individual implementations or products, nor does it constrain the implementation of entities and interfaces within a system. Conformance of equipment to this Recommendation | International Standard is achieved by conformance to the protocols specified to fulfil the Transport Service defined in this Recommendation | International Standard.