QinQ是一种二层交换技术，在服务商网络边缘连接用户网络的交换机（即PE）上配置，实现了“用户数据跨服务商网络透明传输”，达到VPN的效果。
QinQ is a two-story switching technology in the service provider network edge switch connected to the network users (ie PE) configuration to achieve a "user data across service provider networks transparent transmission" to achieve the effect of VPN. (2014-02-23, WORD, 119KB, 下载2次)
淘宝云客服的一些说明文件，给大家一个兼职的机会。。。共享共享~~~~………………
The Amoy Bowen customer documentation, a part-time opportunities. . . Share share ~ ~ ~ ~ .................. (2012-06-17, WORD, 84KB, 下载2次)