The Computer Network Security Experiment Simulation And Examination System

The computer network security is a course which the student is requested to study in most of college or university, including theory and experiment. Due to lack of fund and device, the number of computer network security experiment is less and the experiments are difficult. To simulate computer network security has the virtues of overcoming the difficulty fund, equipment and field. The computer network security experiment simulation and examination system is used to teaching, training and examination, based on real network environment.The computer network security experiment simulation and examination system includes"teacher end"and"student end". The teacher end can manage information security experiment, monitor student experiment status and give a lesson. Student can use the student end to fulfill experiments. The function of this system includes teaching, experiment and management.In this paper, the actuality of network security experiment is analyzed, the modern simulation technology is introduced, and the background, model and development of virtual laboratory experiment are researched. The architecture, character and teaching task of computer network security course are analyzed. The content of network security experiment is divided to network attack and network defensive. In grade of difficulty the experiment is made up of elementary, middle and advanced experiment.The computer network security experiment simulation and examination system is particular analyzed and designed. Total design scheme and system structure is presented. Using OOP method and theory, system is abstracted to model, including network hardware, software and network. Network hardware device is abstracted to device base class, software is separate divided to network command, and network model uses dynamic method in which communication is via frame.Finally key technology is carefully researched in this system. Judge IP address can prevent taking place of another student to exam. The method to save the answer in several seconds can fulfill offline answer save. To transfer some data to another server can reduce the load of main sever.A lot of message about exam question, student and teachers is made into formatted Excel file, is input MySQL database followed.In this paper the system model is completed and designed, important technology is carefully researched. There is important practice value in computer network security experiment. This system can be used in experiment exam, is a good market future, and is important society value. However, the system is really completed using program. In the future, the computer network security experiment simulation and exam system is used in Internet.