What is the concept (purpose) of Dynamic DNS?
You must first grasp DNS in order to comprehend what Dynamic DNS (DDNS) is. It is a mechanism that associates a domain name, such as squadrainformatica.com, with an IP address (220.127.116.11).
The same idea is applied by Dynamic DNS but to a WAN IP that changes over time or is “dynamic.” Since having a fixed WAN IP address that never changes is expensive, the majority of household broadband plans do not contain a static WAN IP.
In other words, even if you write down or memorize your current WAN IP address, you generally shouldn’t rely on it to dial your home phone. This is because when you do, that address might have changed to someone else’s home network.
To solve this problem, we use DDNS. It links your current WAN IP address, whatever it may be at any given moment, with a reliable domain name of your choice.
As a result, you don’t even need to know your home network’s IP address to access it using that label (domain name) from anywhere in the world.