任何形式的互联网服务都会导致安全方面的风险,即使是收发E-mail和文件共享也要防备“信息土匪”的非法入侵。幸好现在已经有5种网络安全系统供选择,可以将风险降低到最低程度,它们分别是:防火墙、安全检查(身份认证)、加密、数字签名和内容检查。防火墙防火墙并非万能,但对于网络安全来说还是必不可少的。它是位于两个网络之间的屏障,一个是内部网络(可信赖的网络), Any form of Internet service poses a security risk, and even sending and receiving e-mail and file sharing must guard against the illegal invasion of “informational bandits.” Fortunately, there are now 5 network security systems to choose from to minimize the risk: firewalls, security checks (authentication), encryption, digital signatures, and content inspection. Firewall Firewall is not a panacea, but for network security is still essential. It is a barrier between two networks, one is the internal network (trusted network),