(Network security technology is generated with the development of hacking technology. When we study network security, we should first study the common intrusion/intrusion methods and attack technologies of hackers. Therefore, this article mainly explains network security precautions through the study of hacking technology, and firstly introduces the corresponding security precautions by exposing the principles and attack methods of hacking. Through many attack examples and prevention examples, everyone can master the basic prevention technology of network security, understand the principles and methods of hacker attacks and the damage caused, so as to improve the awareness of network security prevention and enhance the ability of network security prevention.)