At last, data link layer protocol was implemented on CARDS. Practical application shows that this design model is correct.
最后，在智能卡芯片上实现了此层协议，实际应用证明系统运行正确。
This thesis introduces the Petri net and the Petri net model of a data link layer protocol, and illustrates the properties of the net with S-invariant and T-invariant.
本文介绍了Petri网和数据链路层协议的一个Petri网模型，并且用S不变式和T不变式证明了该网的活性及其它性质。
Current status of underwater acoustic networks and the networking techniques are intro-duced. A data link layer protocol for shallow water acoustic networks is proposed and simulated on NS2.
简要介绍了水声通信网的研究现状和水声网络组网方式，提出一种比较适合于浅海的水声通信网数据链路层协议，并在NS2仿真器上进行了仿真研究。
The support of any suitable data link layer protocol, e. g. PPP, Ethernet, etc. , shall not be prevented.
支持所有相匹配的数据链路层协议，例如PPP，以太网等，不应该被阻止。
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.
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。
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