The research on network security evaluation model is based on the purpose of achieving system security, and in accordance with scientific procedures and methods, the dangerous elements in the system are fully analyzed qualitatively and quantitatively, and a comprehensive evaluation is made. Security needs are undergoing a transformation from information security to information assurance. Traditional passive protection can no longer adapt to the current security situation, and the active network security detection and evaluation theory has emerged. This paper discusses the current status of computer network security, and gives the steps of using the evaluation model to evaluate network security in combination with engineering examples. The evaluation results are basically consistent with the actual situation. Keywords: network security; evaluation index system; analysis method With the continuous advancement of Internet technology, the network has penetrated into all fields and aspects of society. While enjoying great convenience, people have gradually become dependent on open and interconnected network systems. However, information resource sharing and information security are inherently contradictory. In particular, the universality of information and the widespread vulnerability of information to attacks are two sides of the same coin. More importantly, the information network, which is dedicated to carrying and transmitting information, has inherent characteristics such as non-supervisory, cross-border, undefended, and lack of legal constraints. While bringing benefits, value and convenience to people, it also brings huge risks and hidden dangers. The formulation of effective security strategies and plans is the primary goal of network information security. As people pay more and more attention to network security, the first thing to do is to evaluate the security of the network. The comprehensive evaluation of a network\'s security is an important technology and indicator in network security defense, and is also an important part of information security engineering. Providing system administrators with detailed and reliable security analysis reports based on the inspection results can enable managers to understand the existing security status and loopholes in security strategies, providing an important basis for improving the overall level of network security.
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