链路层是指提供对物理层访问的设备驱动程序，这可以是各种介质，例如串口链路或以太网设备。
The link layer refers to the device drivers providing access to the physical layer, which could be numerous mediums, such as serial links or Ethernet devices.
它使公司在远地的用户通过因特网链路合法访问存储在总公司服务器中有限制的公司信息。
It gave a firm's users at remote sites authorised access to restricted corporate information stored in servers at the main office, via an Internet link.
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.
本地聊天链路访问协议LLAP ？
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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