随着国内外计算机技术和通信技术及应用的快速发展,目前传统电信网正在向信息网迅速发展。人类进入了一个崭新的信息时代。以网络方式获得信息和交流信息、已经成为现代信息社会的一个重要特征。网络正在逐步改变人们的工作方式和生活方式,成为当今社会发展的一个主题。本文从计算机网络安全的相关知识概述出发,分析了互联网环境下影响网络安全的原因,并提出了维护计算机网络安全的对策。 With the rapid development of computer technology and communication technology and application at home and abroad, the traditional telecommunication network is rapidly developing to the information network at present. Mankind has entered a brand new era of information. Accessing information and exchanging information online has become an important feature of modern information society. The Internet is gradually changing people’s working methods and lifestyles and has become a theme of today’s social development. This article starts from the overview of related knowledge of computer network security, analyzes the reasons that affect the network security in the Internet environment, and puts forward the countermeasures to maintain the computer network security.