if IPs can change several times, how do apps deal with functionalities that required your previous IP? Also, why is IPv6 not the norm (i.e. in video games, web browsing, etc.)?
In: 5
Apps don’t usually need your IP to know who you are. They would do that through cookies/tokens/connection ID; some kind of data your device can present to the app service that it uses to distinguish you from everyone else. With that, no matter where you’re coming from (even if your IP changes) they will keep track of your latest routing information and send you your necessary data.
When an app you’re using needs to interact with a service providing the functionality of the app, it usually uses DNS to be directed to the right IP, rather than a fixed IP (although it can use a fixed IP, but that’s inefficient).
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