【正文】 or process switching. NetFlow Principle NetFlow technology, two key elements of NetFlow buffer operation and flow of information storage. Start NetFlow NetFlow service equipment will open a buffer, which contains all the activities of the current flow of information. In dealing with the first flow of the first packet, the buffer start building. For each of the activities of a buffer flow, has a flow record (flow record) corresponding. Each record contains a stream of the flow of critical information, this information will be regularly sent to the flow information collection device (NetFlow CollectionEngine), the flow information collection device to save all the information flow through the device39。s data, must also provide for a no ambiguity, unified data description syntax and encoding formats. Therefore, ITU provides the definition of information model of managed object definition syntax guide GDMO (Guidelines for Definition of Managed Objects) [18], OSI application layer protocol Common management information protocol CMIP (Common Management Information Protocol) [19], the standard data description language (Abstract Syntax Notation One) [20]. GDMO is mainly used to describe a variety of work syntax needs to be managed in a variety of concrete and abstract resources. General equipment manufacturers need to use this syntax information model describes the device out of the convenience of users or other manufacturers to achieve the management of the equipment. The underlying protocol CMIP general use OSI protocol stack is mainly used to achieve the GDMO object definitions of various operations such as create, delete object instance, read and write attributes so. As the hardware, software platforms, data format (encoding format, word length, the internal addressing boundary structure, etc.) of different, TMN managers and agents must pass the data Description Syntax description to ensure the reception to properly analyze the data, remove the correct data content. is not only a data description language, it also provides for munications between the parties with a data encoding format, such as BER (Basic Encoding Rule). In a management process and management procedures to be between the definition of a standard GDMO information model, with the definition of interactive data, using CMIP to achieve interoperability. This point is achieved, we can think of devices to ply with the TMN Q3 interfaces between modules (Reference Point) standards. Of course, ITU is also provided for other interfaces, such Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2021 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 86 as QX, X, etc., these interfaces can be considered for the Q3 of services. objective of the research and content This article is designed Campus Network Traffic Management System, the school principal is to achieve the original work data and traffic speed data acquisition, plete realtime monitoring and statistical data, and to plete work on the statistical business data, so the work service providers to that the advanced traffic management system is to provide an important guarantee of quality work services, in improving the quality of service plays a crucial supporting role. II. THE FLOW OF INFORMATION ACQUISITION METHODS AND RELATED TECHNOLOGIES 1. Overview of the work data stream collection method Measurement and analysis of work data flow, the rapid development of the work today, with its significance. Shortterm work traffic data collected can be used to detect utilization of work resources, abuse, and a variety of malicious attacks。 rulebased intelligent work management system better able to adapt to changes in the work。s rapid development and work management is weak, so that the Commission39。s echo / echoreply message pair, provided both parties to municate in the test may, for example monly used ping mand. Another time stamp and time stamp to respond to news that can be used to monitor the work delay characteristics. the other hand, forecasting work performance to every certain time interval, periodically monitors and dynamically forecasts (all kinds of work and puting resources), work performance. Performance measurement process, data collection, after a moment, the numerical model can predict the next time the TCP / IP end to end throughput, delay, mainly used for largescale puting WAN scheduling [910] . 3. The development trend of work management technology development of work management standards With the Inter39。 according to the number of measurement points, divided into singlepoint measurement and multipoint measurement。 reduce work operating costs, improve work efficiency, reduce work bottlenecks, and can adapt to a variety of multimedia technology to make it easier for more secure work use. Authorized licensed use limited to: GUILIN UNIVERSITY OF ELECTRONIC TECHNOLOGY. Downloaded on April 21,2021 at 07:38:02 UTC from IEEE Xplore. Restrictions apply. 82 The field of work management technology Network management technology are mainly related to the following research areas [23]. s daily life has bee increasingly important role, the puter work of individuals and enterprises are increasingly being an indispensable tool for daily activities. Many panies, state ans and institutions of higher learning need to use every day on the work data such as and fax, video conferencing and voice services, etc. to ensure their normal work.. On the other hand the position of the puter more and more plex, it is mainly manifested in the increasingly large scale working, and working equipment is a heterogeneous multidevice, multimanufacturer environment, multiprotocol, there is no doubt this new situation increase the difficulty of work man