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read the transcript!
there are 3 main levels of authoritative DNS servers
root (wearing 3 crowns): I’m in charge of EVERYTHING
.com nameserver (wearing 2 crowns): I’m in charge of all domains ending in .com
example.com nameserver (wearing 1 crown): I’m in charge of all domains ending in example.com
the root nameserver delegates
what’s the IP for example.com?
root: I am not concerned with petty details like that. Here’s the address of the .com nameserver.
the .com nameserver also delegates
what’s the IP for example.com?
.com nameserver: I am not concerned with petty details like that either. Here’s the address of the example.com nameserver
the example.com nameserver actually answers your questions
what’s the IP for example.com?
example.com nameserver: 93.184.216.34!
this design lets DNS be decentralized
example: for my domain jvns.ca
root (ICANN controls this!)
delegates to
.ca nameserver (Canada controls this!)
delegates to
jvns.ca nameserver (I control this!)