| 单词 | open systems architecture (OSA) |
| 释义 | open systems architecture (OSA)A model that represents a network as a hierarchical structure of layers of functions; each layer provides a set of functions that can be accessed and that can be used by the layer above it. Note: The layers are independent in the sense that the implementation of a layer can be changed without affecting other layers.; 一种按照功能分层体系结构来表示的网络模型，每一层都提供了一组功能，高于该层的其它层 次都可以访问和使用较低层的功能。注：在实现各层功能中，层与层之间是互相独立的，每 层的功能模块都可以改变，而不影响其它层次的功能。 |
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