...信道，可能出现站点之间的冲突 受控访问 协议 • 特点：站点被分配占用信道，无冲突 PP31 31 受控访问 （ Controlled Access ） 预先信道分配（Predetermined channel Allocation ）：TDMA 按需分配（Demand Adaptive）：Token Passing • Bus –IEEE802.4...
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此外还引入了访问上下文栈来支持视图和存储过程这类的受控访问机制。
In addition, MSDA adopts access context stack to support controlled access mechanisms such as views and stored procedures.
Rational ClearCase是为跨整个生命周期的软件资产的受控访问提供设计、开发、构建、测试，及部署工具的集成的全面的解决方案。
Rational ClearCase is a comprehensive solution that provides integration with design, development, build, test, and deployment tools for controlled access to software assets across the full lifecycle.
MSDA主要解决了多策略框架对细粒度访问控制和受控访问机制支持不足的问题，并把体系结构实施对原有系统结构和对系统性能的影响控制在较小的范围内。
MSDA not only solves the problem of fine-grained access control and controlled access mechanisms, but also minimizes the influence on the original system structure and system performance.
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