其次从系统建设所用到的技术入手，对三层架构、J2EE框架、GPRS通讯、GPS定位、企业门户网站、网络与安全等方面进行了详细探讨。
Second, from the use of the technology , it discusses detailedly the three-tier structure, J2EE framework, GPRS communications, GPS positioning, enterprise portal, network , security , and so on.
在设计的安全防护网络(SPN)中，前端控制箱与中央控制台之间的联系是由通讯网络来完成的。
In the safe protection net (SPN) designed, the connection of the frontage control boxes and the center control station is accomplished by the communication net.
在计算机网络与通讯技术飞速发展的今天，网络上传输的数据的安全性成为人们日益关注的问题。
Since the rapidly development of the computer network and communication technology, the security of data that transfer on the network attracts more and more attentions.
在计算机网络与通讯技术飞速发展的今天，网络上传输的数据的安全性成为人们日益关注的问题。
Since the rapidly development of the computer network and communication technology, the security of data that transfer on the network attracts more and more attentions.
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