微计算机网络是办公自动化的重要技术。可将许多微机联成一个大的网络系统,以实现多单位、多部门信息的综合检索和处理。微机网络系统是天然的多用户环境。其系统管理方法影响系统的效能。而信息的安全和保密是必须解决的重要问题。本文根据对主流网络Omninet、PLAN2000,Etherseries等应用实践,说明微机网络系统管理和信息安全保护的方法。 Microcomputer network is an important technology of office automation. Many computers can be combined into a large network system to achieve multi-unit, multi-sectoral comprehensive search and processing of information. Computer network system is a natural multi-user environment. The system management method affects the system’s performance. The security and confidentiality of information is an important issue that must be solved. Based on the application of the mainstream networks Omninet, PLAN2000, Etherseries and other applications, this article describes the computer network system management and information security protection methods.