动态DNS解析是如何做到的
动态DNS解析是怎么做到的？
这个问题和PHP无关，但我不知道放在哪个版块合适。
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如果你ping一些大网站，比如youku.com,google.com.hk，就会看到每次解析后的IP都会不同。这就是传说中的负载均衡？
那么它是什么技术实现？
------解决方案--------------------
dns轮询，可以将域名解析到n个ip地址
还有现在的cdn技术也是这样，多个前端
------解决方案--------------------
根据服务器的负载自动分配最近最快的服务器。没弄过这么高端的东西
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