随着信息技术的发展和Internet技术的广泛应用,如今的网络已经成为人们生活中不可缺少的一部分,人们对信息网络系统的需求和依赖程度正在日益增加,与此同时,网络安全问题也变得非常严重。因此,分析影响网络安全的原因,提出保障网络安全的相关对策十分重要。一、计算机网络安全的概念及主要威胁从本质上讲,网络安全是指保护网络系统中 With the development of information technology and the wide application of Internet technology, today’s network has become an indispensable part of people’s lives. The demand and dependence on information network systems are increasing day by day. At the same time, the problem of network security also becomes very serious. Therefore, it is very important to analyze the reasons that affect the network security and propose the countermeasures to ensure the network security. First, the concept of computer network security and the main threat Essentially, network security refers to the protection of the network system