0引言随着社会向网络化、信息化和数字化方向发展,计算机网络已经渗透到人们生活和工作的方方面面,给人们的生活和工作带来了极大便利。但是随着计算机网络的普遍应用,其安全问题也给人们带来了无尽的烦恼,例如个人信息遭到破坏和泄露等。因此,分析计算机网络安全的防范对策,对营造安全的计算机网络环境有着重要的意义。1计算机网络安全中存在的问题(1)病毒入侵。计算机病毒是指人为编制并可以自我复制的指令或程序代码,将其插入到计算机中会破坏计算机的功能与数据, 0 Introduction As society develops in the direction of networking, information and digitization, computer networks have penetrated into all aspects of people’s life and work, bringing great convenience to people’s life and work. However, with the widespread application of computer networks, its security problems also bring endless troubles, such as personal information being destroyed and leaked. Therefore, analyzing countermeasures of computer network security is of great significance to creating a secure computer network environment. 1 computer network security problems (1) virus invasion. Computer virus refers to the artificial code and self-copy instruction or program code, insert it into the computer will destroy the computer’s functions and data,