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简单介绍了宽带VPDN业务 ,分析了宽带VPDN基本原理及其在宽带IP城域网上的基本应用模式 ,并介绍了在宽带IP城域网上进行的宽带VPDN试验情况
Introduced the broadband VPDN business briefly, analyzed the basic principles of broadband VPDN and its basic application mode in the broadband IP metropolitan area network, and introduced the broadband VPDN test carried on broadband IP metropolitan area network