This article introduces demand-dail routing, VPN and ADSL technology and puts bring forward an network interconnection scheme based on the technology. This scheme can be used widely in the network interconnection field.

• 介绍了请求拨号路由 (DDR)、VPN及ADSL技术 ,提出了采用这些技术实现网络互连的方案 ,该方案可广泛应用于异地局域网的互连