How a DNS query reaches an answer
Your device normally asks a recursive resolver first. If there is no usable cached answer, the resolver follows the DNS hierarchy: root servers point to a top-level domain, the top-level domain points to authoritative name servers, and the authoritative server returns the record for the domain. The resolver then caches the answer for its TTL.
Why DNS matters during incidents
A website can be healthy while DNS is wrong, and a correct DNS record can still point to an unreachable service. Check DNS records first, then use website diagnostics to confirm the target responds as expected.
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