域名注册与全局根级别DNS服务器有关，如果您希望Internet上的其他人使用URL(而不是URL)与您连接，则必须进行域注册您的IP地址).

活动目录中的本地DNS用于解析内部计算机的内部LAN名称.

Domain registration has to do with the global root level DNS servers and is required if you want others on the internet to connect to you using a URL (not your IP address).

Local DNS in your active directory is for resolving internal LAN names for your internal computers.