而事实上，证书可能会散放在某人的工作站或移动电脑上，并且提供的物理访问控制非常小，这进一步复杂化了该问题。
This is compounded by the fact that the certificate may be "in the wild" on somebody's workstation or mobile computer with minimal physical access controls.
内存管理单位，把虚地址转化为物理地址并且提供访问许可控制。
MMU Memory Management Unit, translates virtual to physical addresses and provides access permission control.
通过提取网络层和物理层中的一些信息，可以改进MAC(介质访问控制)层协议的设计。
The design of MAC protocol can be improved by extracting information in network and physical layers.
该系统还允许有第三方的访问控制和物理安全系统的更多的整合。
The system also allows more integration with third-party access control and physical security systems.
MMU的功能是控制各种存储系统的工作并将虚地址转换成物理地址，以及控制存储器访问权限。
The functions of the MMU are to control the various memory systems, translate the virtual addresses into physical addresses and control the access permission.
无线自组网的介质访问控制(MAC)协议是与物理层密切相关的，大多数MAC协议都要求物理层具备载波感知能力。
The media access control (MAC) protocol of mobile Ad Hoc networks (MANETs) is closely-related with its physics layer, most MAC protocols request the capability of carrier sense in physical layer.
本通信协议分为物理层、介质访问控制层和逻辑链路控制层三层设计。
The communication protocol is designed in term of three layers: Physical layer, Media Access Control layer and Logic Link Control layer.
本通信协议分为物理层、介质访问控制层和逻辑链路控制层三层设计。
The communication protocol is designed in term of three layers: Physical layer, Media Access Control layer and Logic Link Control layer.
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