this post was submitted on 06 Jul 2026
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Explain Like I'm Five

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[โ€“] Serinus@lemmy.world 3 points 12 hours ago (1 children)

It also allows the numbers to change at any time, since it updates a lot faster than a phone book.

[โ€“] dfyx@lemmy.helios42.de 1 points 12 hours ago

Yes. That's why DNS has a TTL (time to live) in seconds in every response which specifies how long you should remember it before you ask again. The 256 seconds in my example are the real TTL that I got when asking for lemmy.world.