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 typically don’t need your previous IP.
Either you have a user account to identify you, or a session cookie, or something else.
An app or service would need your IP if they’re trying to initiate a connection with you, but servers rarely start this process on their own.
Usually, it’s you, your app, the “client” that makes the first move. When the client connects to the server, the server sees the current IP, and the old IP is no longer important to it.
Servers rarely change IPs, and when they do, their host name records are updated at the same time, so that www.whatever.site now points to the new IP.
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