网络的应用正在改变着人们的工作方式、生活方式与思维方式,对提高人们的生活质量产生了重要的影响。伴随而来的网络安全问题越来越突出。本文论述了网络安全的威胁,介绍了常用的几种网络安全防范技术,并对其优缺点做了综述。 The application of the Internet is changing people’s working methods, ways of life and ways of thinking, and has an important impact on improving people’s quality of life. The attendant cybersecurity issues are becoming more and more prominent. This article discusses the threat of network security, introduces several commonly used network security techniques, and reviews its advantages and disadvantages.