求翻译：本次论文研究中，我首先了解了网络安全问题的主要威胁因素，并利用网络安全知识对安全问题进行剖析。其次，通过对网络技术的研究，得出校园网也会面临着安全上的威胁。最后，确立了用P2DR模型的思想来建立校园网的安全防御体系。并得出了构建一套有效的网络安全防御体系是解决校园网主要威胁和隐患的必要途径和措施.是什么意思？

This thesis, I first learned about the key threats to network security issues, and network security knowledge to analyze the security issues. Second, network technology, come to the campus network will be faced with security threats. Finally, to establish a p2dr model of thinking to create a campus

This dissertation research, I first learned about the issue of network security, the main factors of threat and use of network security knowledge to analyze security issues. Secondly, through the study of network technology, campus security will also be faced with the threat. Finally, established th

In this paper research, I had first understood the network security question main threat factor, and carries on the analysis using the network security knowledge to the security problem.Next, through to the networking research, obtains the campus net also to be able to face in the security threat.Fi

In this thesis, I understand how the main threats to network security problems, and to use knowledge of network security analysis on security issues. Secondly, through the research on network technology, coming to a campus network will also be faced with security threats. Finally, established with t