TOPIC NETWORKING
DNS how names become IP addresses
IN 10 SECONDS
The internet's phone book: you ask for `supraj.dev`, a chain of servers answers with `76.76.21.21`. Everything else is caching and who gets asked.
GOTCHA "It works on my machine" DNS bugs are almost always stale cache or a TTL that hasn't expired yet.
HOW A LOOKUP FLOWS
01 Your machine checks its own cache first — most lookups end here.
02 Resolver (your ISP or 1.1.1.1) takes the question and does the legwork.
03 Root → TLD servers point it toward whoever owns `.dev`.
04 Authoritative server gives the real answer, cached for its TTL.
POKE IT YOURSELF
dig +short supraj.dev — just the answer, no noise
dig +trace supraj.dev — watch the full chain above, live
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