What Does Dynamic Domain Name System (DDNS) Mean?
Dynamic DNS (DDNS or DynDNS) is a mechanism by which the name server in the Domain Name System (DNS) is automatically updated with the custom domain name and the ever-changing IP addresses. The DNS method is helpful in the case of dynamic IP addresses, where the IP address is mapped to a custom domain that changes frequently. However, in the case of a static IP address mapped to a custom domain, DDNS is not required. In general, a dynamic IP address is provided to residential or small business users. Big enterprises generally use static IP with their domain names.
Techopedia Explains Dynamic Domain Name System (DDNS)
In the early days of DNS, databases were small and it was easy to manage them manually. However, when a domain database grows, it becomes difficult to manage and update globally. The DNS system and domain name registers are distributed in nature, so it could take hours to update. In this scenario, The DNS system is suitable for static IP addresses mapped with custom domains.
