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网络是计算机技术和通信技术的产物,在国防、电信、银行、广播等方面都有广泛的应用。其安全性是不可忽视的,网络安全主要是由于TCP/IP协议的脆弱、网络结构的不安全、易被窃听和缺乏安全意识等原因造成的,网络入侵者主要通过破译口令、IP欺骗和DNS欺骗等途径攻击网络。防范措施主要通过防火墙技术和数据加密技术来完成。
Network is a product of computer technology and communication technology, and has a wide range of applications in national defense, telecommunications, banking and broadcasting. Its security is not negligible. Network security is mainly due to the fragility of TCP / IP protocols, unstructured network structure, eavesdropping and lack of security awareness. Network intruders mainly break passwords, IP spoofing and DNS Cheat and other means to attack the network. Preventive measures are mainly through the firewall technology and data encryption technology to complete.