目前很多企业虽然在网络安全建设上都大量投资,设置防火墙、防病毒软件等,但一段时间运作下来,发现效果并不理想,病毒依然时常泛滥、重要信息常被泄露、网络可用性差。究其原因,关键在于安全是一个完整的体系,企业在进行网络安全建设时忽略的原来的安全体系架构的缺陷。这些缺陷涉及了三方面内容,可以从时间、空间和网络层面上划分。 At present, although many enterprises invest heavily in the construction of network security and set up firewalls and antivirus software, they have been working for a period of time and have found unsatisfactory results. Viruses are still frequently spread, important information is often leaked, and network availability is poor. The reason is that the key is that security is a complete system, and the defects of the original security architecture that enterprises overlook when building their network security. These defects involve three aspects, which can be divided in time, space and network level.