ISP/NAP Hierarchy -"The Internet:Still hierarchical after all these years."Jeff Doyle (Tries to be anyways!) NAP(Network Access Point) Network Network Service Service Provider Provider 地址分配 Regional Regional Regional Regional Service Service Service Service Provider Provider Provider Provider 路 地址块划分 前级汇聚 ISP ISP ISP ISP ISP ISP ISP ISP Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers信息网络与协议 Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers Subscribers ISP ISP ISP ISP ISP ISP ISP ISP Regional Service Provider Regional Service Provider Regional Service Provider Regional Service Provider Network Service Provider Network Service Provider NAP (Network Access Point) ISP/NAP Hierarchy - “The Internet: Still hierarchical after all these years.” Jeff Doyle (Tries to be anyways!) 地 址 分 配 地 址 块 划 分 路 由 前 缀 汇 聚