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计算机网络的安全是一个国际化的问题,每年全球因网络的安全问题而造成的经济损失达数百亿美元。政府、银行、大型企业等机构都有自己的内部网络,但是局域网的网络管理却是平面型的,从网络安全的角度看,公司的内部系统被入侵、破坏与泄密是一个严重的问题。据统计,全球80％以上的入侵来自于网络内部。此外,不太自律的员工对网络资源无节制的滥用也可能对企业造成巨大的损失。
The security of computer networks is an international issue. Every year, the global economic losses caused by network security problems amount to tens of billions of dollars. The government, banks, large enterprises and other agencies have their own internal network, but LAN network management is flat, from the network security point of view, the company’s internal system was invasion, destruction and disclosure is a serious problem. According to statistics, more than 80% of the world’s invasion comes from within the network. In addition, unbridled abuse by less-disciplined employees of online resources can also cause huge losses to businesses.