The computer network technology is developing
rapidly, and the development of Internet technology is more
quickly, in this case, people more aware of the importance of
network security. Due to the information system in the
application of the need for security protection, therefore, the
study of computer network security problems are always
revolve around the information system. Nowadays, the global
computer network security companies and scientific research
departments are trying to study and solve the problem of
network security, not only developed a variety of maintenance
network security hardware and software products, and
launched a variety of security of network communication
standards and specifications. This article is from the network
between the transport layer and application layer, designed a
network security system base