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
The trick is that only 1 person needs to have a the same IP, after that everyone else can just connect, present some proof that it’s them, the app people then just note down the IP and send it to them.
EG: Your app knows that the app’s servers are always at XXX.XXX.XXX.XXX IP, so it sends your stuff there with stuff that proves that it’s you, the server there sends stuff back to where it received it from.
A large chunk of the time, that person isn’t even the app maker. It’s the DNS server. That’s the server that turns www.reddit.com into whatever IP your computer uses.
Meaning reddit can move their IPs as often as they like, they just need to update the DNS guys.
IPv6 isn’t as common because it’s relatively new and some devices can’t use it yet.
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