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What is a DNS and what does it do? (lemmy.world)
submitted 4 months ago by to c/explainlikeimfive@lemmy.world
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[–] 2 points 4 months ago (1 child)

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

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  • [–] 2 points 4 months 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.

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