互联网站点实现来自不同ISP用户的快速访问——智能DNS解决方案

目前中国有中国电信、网通、移动、联通、铁通等ISP（互联网服务提供者），由于各ISP通信网络互联的成本、地域及其他因素，各ISP用户访问位于其他ISP的互联网站点速度较慢且不稳定，严重影响了用户体验和互联网发展。目前各大网站都通过各种办法解决这个问题，如托管于BGP机房、使用两套域名等。文中阐述了一个切实可行且成本相对较低的解决方案，即在各重要ISP建立网站镜像，并通过建立智能DNS（域名服务），引导用户访问速度最快的网站镜像的方案；重点描述实现智能DNS的方法。

Speeding up the Internet User'S Access Time for Websites an Intelligent DNS Solution

There are many ISPs in China,such as China Telecom, China Netcom, China Mobile, China Unicorn, China Tietong, etc. Due to the cost of inter-connection between different ISP, the interact users suf- fer a low access speed to a web site which is only located in one ISP, which gives the internet user a pool performance. The main websites of China are trying to overcome it through hiring a BGP IDC or using two domain name. This paper describes a scheme that builds multiple mirror sites in main ISP and establishes an intelligent DNS which redirects the interact users to the best mirror site. The paper focuses on how to implement the intelligent DNS.