Computer networks have become an integral part of daily life as the continuous development of network technology and the rapid popularization of network applications, which involves daily life, study, work, entertainment and other aspects. Traditional computer networks have been unable to meet the needs of the modern network because of its security, stability, scalability and other issues. Therefore, the formation of a good scalability, security, stability, and efficient computer networks, has become the domestic and international network applications on the main topic.This start from the common network technology and network equipment which related to the campus network construction, it systematic study of the VLAN, ACL, QOS, IP routing and network security technologies, as well as switches, routers, firewalls and other commonly used network equipment. The technology and network equipments were discussed thoroughly in the construction of the campus network. At the same time, study the application of the network infrastructure and analyze the advantages and disadvantages and key applications of different network architecture.Combining the actual situation of Journal of Chuzhou vocational technology college, designs network architecture which based on three-layer. Campus network hire 100M fiber which from telecommunications access to Internet by firewall. The core layer, the convergence layer and access layer consist of the inside of campus network, three layers and two layers switches were chosen. The campus network was partitioned by VLAN technology which facilitates the management and maintenance in the process of Implementation of network. Using the technology of removing Gateway down to improve the transmission rate of internal network each partition, and reduce the pressure of core switch that the network imposing. Using the technology of speed restricted of the port to ensure the flow of the entire network, so as to achieve the service that the campus internal network is uninterrupted. Using the technology of front-end communications with the bank, that achieves to transfer money from the bank card to campus card. The integral performance of the campus network is improved by using of these technologies.The campus network is stable and safe as the second project has been using more than one year, which ensures the normal operation of teaching system, e-government systems and card systems, which based on campus network. Practice shows, the layered structure of the network model combined with the technology of advanced network application, which can effectively solve the problems of traditional network and build a secure and stable environment for the campus network.This article proposed network design of three-layer structure and application technology of LAN, which provide reference and guidance for future large-scale campus network construction and optimization, And provides rare reference solutions to similar institutions and enterprises for the network construction. |