互联网的迅猛发展彻底改变了人们的日常生活和工作方式,人类社会已迈入了网络时代,电子政务及电子商务等互联互动的工作模式是大势所趋。多网并存,一台电脑连接多网的局面已普遍存在。毫无疑问,联网就有可能遭到网络攻击而导致泄密,如何保证同一台电脑在连接外部网的同时,又可 The rapid development of the Internet has completely changed people’s daily life and work style. Human society has entered the era of Internet. E-government and e-commerce and other interconnected work modes are the trend of the times. The coexistence of multiple networks, a computer connected to the network situation has prevailed. There is no doubt that networking is likely to be compromised by cyber attacks. How can we ensure that the same computer can connect to the external network as well as