163骨干：ChinaNet(也叫 163 骨干网，AS4134), ip以202.97开头. 定位于承载普通质量的互联网业务, 基建早, 带宽大, 便宜。因为用的人多，并且优化程度低，因此在出国线路上比较拥堵，速度慢，并且丢包率高。
CN2 GT：(半程走 CN2) CN2中端产品, 本身接入网络是 ChinaNet(AS4134), 省级骨干走163(去程和回程都会出现202.97节点), 出口才走 CN2(AS4809)，线路使用的是163骨干和CN2 GIA混合线路，因为163骨干线路的原因所以在晚高峰时期有可能会出现网络拥堵的情况，但是相比于传统163骨干网依然有不少的提升
CN2 GIA：(全程走 CN2) CN2高端线路, 本身接入网络 CN2(AS4809)，出口也是 CN2(AS4809)。全程没有202.97部分未部署CN2 节点的省份城市, 会经163(202.97)然后接入CN2节点，CN2 GIA的价格比CN2 CT高出约3倍，因此线路表现最好、最稳定，很少出现拥堵的情况（最优）
区分—-服务器mtr到电信IP，CN2 GIA优于CN2 GT优于163
163骨干：节点全部为202.97段开头的即为163骨干网络；
CN2 GT：节点为207.97和59.43混合即为CN2 GT网络；
CN2 GIA：节点全部为59.43的即为CN2 GIA网络；（如果地区没有直筒的59.43也会走207经过）
联通
AS4837： (联通 169 网络) 民用骨干网, 定位相当于163. 圣何塞回程AS4837称之为 CU VIP.
AS9929： (联通A网, CU PM), 定位相当于CN2, 更像CN2 GT, 服务于政企大客户. AS9929的价格比AS4837贵5倍以上. 和电信的GIA差距还很大(炸起来的时候完全没法用).
AS10099 (联通国际出口, CUG). 联通出国 可能是AS4837直接出国, 或 内地AS4837/AS9929, 出境接入AS10099.
联通网络价格比较美观 但是经常波动，和电信还是有较大差距
移动
CMI：(移动自己的国际出口, AS58453-AS9808) 一般回国有Qos限速(例如NTT带宽，可加钱可升级保证国内带宽) ，线路就那样
CMCB：(移动商宽) 国际出口高Qos等级特权（一般没服务器用这玩意）
香港CN2 GIA≈CTG≈AS9929＞CN2GT＞CUVIP≈163
美国CN2 GIA≈AS9929＞CN2GT＞CUVIP≈163
本文转载于：https://itdun.cn/?id=3
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