本地聊天链路访问协议LLAP ？
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.
安全交换机所在的内部网存在的一个显著问题就是网络链路协议不可控，使得任何遵守标准协议的网络访问在底层机制上都是合法的。
A notable problem is raised that the data link can not be controlled; therefore any access following the standard Ethernet data link layer protocol is recognized as legal.
安全交换机所在的内部网存在的一个显著问题就是网络链路协议不可控，使得任何遵守标准协议的网络访问在底层机制上都是合法的。
A notable problem is raised that the data link can not be controlled; therefore any access following the standard Ethernet data link layer protocol is recognized as legal.
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