Based On The Mpls-vpn Technology To Build The Research And Realization Of The Municipal E-government Platform

In the network erea, especially development of network economy, the scope of the enterprise is expanded day by day, and it' s customers spread everywhere, the traditional access way of Private line based on fixed place of corporate network, already is difficult to meet the demands of modern enterprises' . The virtual private network (VPN) exactly meet this kind of demand nowadays and born. The virtual private network refers to depend on ISP (Internet service provider) and other N'SP (network service provider), which is the technology of setting up the special-purpose data communication network in the public network. The virtual private network (VPN) represent current network newest trend of development, and it will become a future enterprise and department main tool to transmit business.YPN can have many kinds of division from different view: Such as according to commercial use, there are Intranet, Extranet and VPDN (Virtual Private Dial-Network); According to adopting two-tier technology or three-tier to be divided, there are frame relaying based on technology of two-tier, ATM VPN and IPVPN based on three-tier. MPLS (MultiProtocol Label Switching) has offered the foundation for the merge of the telecommunication, computer, and cable TV network. Except ATM, which is the only multi-business convey and package exchange network platform that can offer high-quality data, pronunciation, video that merge convey. The network of MPLS-VPN adopts labels exchange, and solves QoS/CoS problems that puzzles traditional IP network. MPLS-VPN offers the flexible tactics to control, and can meet different users' special requirements.it realize the value-added service (VAS) rapidly. At the ratio of bandwidth price and the ratio of performance-cost.,It has the more advantage Comparing with the others wide area network. So MPLS-VPN based on MPLS technology, is the most advanced VPN in the all respects of flexibilily, expanding and the security at present.Building the unifited E-government private net platform of of the whole city for the centre with the new muni(?)ipal office building of urban area, the private network of the government (?)inks from up to provincial private network, and down to the county District, which covers five major groups, all directly subordinated department, the enterprises and institutions...