| In some specific areas or in certain exceptional circumstances, there does not have a unified network architecture in charge of the departments and subordinate departments. As an example to my department, there are several network in different architecture, but only one in subordinate department. So, how to use of these different networks, make it more smooth and convenient for communications, is a big problem to be solved.A solution of this issue is to use one or more routers to connect several networks to achieve the purposes of data exchange and processing. However, this should bring about a series of other problems, such as cost control. Because the purchase of high-performance router requires a lot of money. On the other hand, special data filtering is also not easy. If prepared to use their own procedures, then these issues can be resolved more easily.Target system is an application-oriented network communication systems. It needs to solve practical problems, and taking into account the various aspects, such as interoperability, security and so on.As a solution of the system, the router is characterized by short time to complete. Equipment purchased, it only requires simple installation and debugging, but also stability. However, high-performance router is very expensive. And, the use of routers to filter the specific data is very difficult. Finally, for example, as well as some secret forces and departments, in achieving a specific purpose, the internal preparation of the software is more reliable than third-party.Based on TCP/IP protocol, the system described in this paper use a custom protocol to further enhanced security on data transmission. Among them, the system uses "frequency hopping" authentication technology, which greatly increased the reliability of the system. The article describes in detail of it.In this paper, in order to meet the needs of the integrity of application systems, a simple encryption algorithm was used to realize the transmission of encrypted data. Data Encryption is a necessary part of the application system. There are many kinds of encryption algorithm, they have different speed and different reliability. And encryption is an independent science research. In this article there is only a demonstration of encryption algorithm. In practice, there is reserved interfaces for effective use of complex encryption algorithm.Finally, experimental results show that the target system can be designed to fully qualified, fully achieved the original intention of the design. |
