The Analysis And Research On Network Traffic Measurement System Based On Ntop

With the rapid development of Internet's expansion and diversification,network performance monitoring and management is strongly required. It is very important to understand network behaviors due to network traffic management,network planning and development. The network traffic mesurement technology is one way of network measurement,and monitoring and analyzing network traffic is an effective method to researching the traffic characteristics and getting network status.Firstly, research background of network traffic measurement is analyzed, and the significance of traffic measurement is expatiated.Then,the network measurement's technology and indicator system are deeply studied;By using the theory of network flow analysis,the method of flow analysis such as Netflow,SNMP and Libpcap is expatiated. In addition,the traffice collection technology is analyzed in further detail. In the end,different types of traffic are discussed,the structure of traffic collection is analyzed and the technologies of flow capturing based on devices and softwares are summized and compared in perellel.Based on the theory of traffic measurement mentioned above,a network traffic monitoring system based on Linux(Ntop) is analyzed and researched. The design aim and framewok of this system are thoroughly discussed.the data packet capturing module,packet analyzing model,Web presentation module and network security module,composed of the system,are detailedly expirated. In data packet capturing library under Linux and the framework of traffice collection based on multimode. In data packet analysis aspect,the realization is implemented by making use of the data analysis based on traffic sampling;In the course of implementation,the development and running environment of this system is described and the system deployment is introduced;According to the system flow charts,the related functions are presented. The implementation of the system's fuctions is described. The key technologies adopted by the system are studied.Finally, our works is summarized and some ideas and pieces of advice are brought forwards for the future work.