The Application And Research Of VPN In China Unicom Network

VPN has more advantages than the traditional enterprise network. So more and more device manufacturer, consultant, network designer, service provider, enterprise, terminal chose it.The advantages MPLS/VPN consist of utilizing the board and strong transport capability on public backbone network, reducing the constructing cost of INTRANNET, and overwhelming improving the flexibility of Customer’s network operation and management.And simultaneously MPLS/VPN meets the customer’s requirements with security, timeliness, board frequency and convenience on information transmitting.As many advantages, which this new technology provided, some global multinational companies want to use MPLS/VPN as the future development direction.The paper introduces the concept of VPN, classifying of VPN, relevant technological agreement standard and classifying of VPN. It mainly analyses several kinds of methods of realizing VPN technology in the City Area Network, and then carries on deep analysis to compare to various kinds of implementation methods. And then it deeply analyses and researches the MPLS VPN network-building program of China Unicom CNCNet.At last it probes into the development of VPN in the future...