What happens when you update your DNS?

Julia’s blog explains how DNS updates work:

I’ve seen a lot of people get confused about updating their site’s DNS records to change the IP address. Why is it slow? Do you really have to wait 2 days for everything to update? Why do some people see the new IP and some people see the old IP? What’s happening?

So I wanted to write a quick exploration of what’s happening behind the scenes when you update a DNS record.

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that is really amazing!!!
the way you get young students to do this is really a good idea, since it gives them an idea about networking. Just like the way you changed my interest from software to hardware in that way :smile:.