Based Distance Education Network In The Web Pages Linked To Horse And Dns Abnormal Study

Nowadays, with the development of information technology, the popularity of the Internet, modern distance education has increasingly involved in our real life, and it becomes a new way of education which can help us to receive new knowledge and information in order to improve our abilities, such as professional levels and attainment. Modern distance education breaks the limitation of traditional education, and it has its advantages that traditional one cannot achieve. And it enlarges the range of school education, improves the study environment of studying, and provides numerous teaching resources for those teachers and students in different places and time.However, with the enlargement of education web application, the risk of safety has become more serious and complex, the threat from network because it rely on the network.such as illegal visit, denial of service attack, webpage hanging horse and so on. Distance education brings some convenience to learners, but it faced with severe test of net safety at the same time.This thesis firstly analyzes the characteristics and the system building of web-based distance education system. It followed by the introduction of the related technologies of web network security and analyzes the principal safety potential on present networking. Furthermore, it analyzes the possible safety problems in the system and summarizes the safety requirement of web-based distance system basing on the network application characteristics of distance education. Then, this paper aims at further studying the constantly appears problem in distance education system --webpage hanging horse—a kind of serious safety threat on the network at present. And the main focuses are the danger of webpage hanging horse, the traditional ways and classifications of webpage hanging, and some available methods to prevent this kind of viruses. Finally, we analyze the whole process of DNA by visiting the hang-horse website www.mechina.org, make a contrast with the normal website www.sina.com, find out the differences and common characteristics, and try to stop the website hang horse from the aspect of analysis of DNA domain. Website hang horse exists everywhere on the net, modern distance education as a strong way of adding inevitably has to experience such kind of invasion. So, to prevent the hanging horse has become more and more important in order to make the distance education escape from attacking and guarantee its steady development.