If you are considering a static IP address, it is important to remember that there are many different advantages that come with having one. Naturally there are also disadvantages. One of the downsides of configuring a static IP address is that it can grow quite expensive. Free Dynamic DNS by ClouDNS is often regarded as a much more portable option and it will continue to work whether you have a dynamic or static IP address. On the other hand, for all the premium accounts we provide an additional and very beneficial feature - Dynamic DNS history.
让我们看看下面的情形 - 您正在使用如亚马逊 EC2 或谷歌云的服务。他们默认给您一个动态IP地址。如果您想要一个静态IP地址，您将会被另外收费。在这种情况下，拥有一个动态DNS会更具有效率并且降低您的花费。
动态DNS的工作方式是，让网络设备能够通知DNS服务器实时自动更改，以及活动DNS配置、IP地址、配置的主机名和其他一些信息。这通常必须由管理员启动。
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