通信协议模型的简单历史。
文章详细介绍CDPD的网络结构、通信协议模型、通信过程和主要特点。
This article introduces in detail the network structure, the communication protocol model and the process of communication of CDPD, as well as its main features.
提出了一种安全的通信协议模型EABRA，通过该模型可以简单有效地实现网络安全通信。
This paper presents a kind of secure communication protocol model-EABRA, by which network security communication can be realized easily and efficiently.
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