互联网的资源共享与开放的模式,把我们带入了一个崭新的时代,但是,随着计算机网络技术的发展,网络安全问题也日益突出!虽然各大网站被黑客攻击事件频频见诸报端,但网络安全问题仍然没有引起我们个那些被黑客入侵的事件之中至少有30%是没有防火墙或者没有正确选 However, with the development of computer network technology, the problem of network security has become more and more prominent. Although major websites have been frequently reported by hacker attacks, the Internet has become more and more popular. Network security issues still do not cause us at least 30% of those hacked events without a firewall or not properly selected