Abstract:

With the campus computer network as an example,the network technology and network security involved in the construction of computer room system are discussed.A computer network based on the VPN technology is designed and developed with an innovative network topology,in which the VLAN division is adjusted.The VPN technology is introduced for better computer network stability and efficiency.A security protection system based on firewall,intrusion detection system is also provided.Tests show all the design requirements are met.

Key words: VPN;the network architecture;security system;intrusion detection