The study on computer network security and precaution

With the coming of the information age, all kinds of high-techniques, such as computer science and network techniques are widely used in different fields of the society which not only have made great economic and social benefits, but also have promoted the rapid development in culture and techniques. While the openness and flexibility of computer network brought us a lot of benefit both in life and in work, it also caused a series of information security problems which put our life into danger. The thesis aims to analyze the nature of computer network security and the major factors that influence the network security, probe the existing problems and possible threats of the network system and work out an effective security precaution strategy. The analysis and strategy are quite useful for establish a safe, efficient and convenient network environment. Besides, they can strengthen the awareness of safety operation and improve the actual application. So they are of great value both in theory and practice.