符号和一个多语种域名 Internationalized Domain Name ; IDN
虚拟主机启用一个服务器来承载应用程序，以获得多个域名。
Virtual hosts Enables a single server to host application for multiple domain names.
注意：虽然您可以向search选项添加多个域名，但不能超出1,024个字符。
Note: Although you can add several domain names to the search option, there is a limit of 1,024 characters.
地理DNS根据用户所处的地理位置，通过把域名映射到多个不同的IP地址提高可扩展性。
Geographic DNS improves scalability by mapping a domain name to different IP addresses, depending on the client's geographic location.
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