Study On Technology & Application Of Network Information Content Monitoring

With the rapid development of China's information industry, information security faces more and more challenges and it is also paid more attention on by administrations and firms.Nowdays we can recognize that the core secrets of governments need to be protected and key technologies in firms could not be leaked out.Additionly,harmful messages on internet should be blocked off and some urgent measures must be taken to fight with network viruses.Finally,personal activities on network must be ruled.All of above result in the emergence of the technology of Network Information Content Monitoring(NICM).A detailed discussion on the technology of NICM is put up by this essay.First,this essay describes the basic network knowledge,introducing the technology of network data capturing ,restoring and analyzing and some related controlling technology as well.It also mentions some useful software tool for network monitoring. Second,it makes an detailed theoretical analysis on the botterneck of NICM,giving why it happens and how to settle it. It explains how the datagram capturing is optimized, using zero copying technology. Third, based on above and considering the facts ,it presents the application of the technology of NICM in two conditions and makes some comments on the results.Forth,it gives us the concept of security management and which role NICM acts as in security management.Finally,it points out the good results and difficulties of the use of NICM and how the technology of NICM will develop.