How cloud DNS resolves a URL to an IP
WHAT IT TESTS: end-to-end DNS resolution flow. OUTLINE: recursive resolver queries root, then TLD, then your authoritative cloud DNS zone; the matching record returns an IP, cached per TTL. RED FLAG: skipping the recursive resolver or caching.
WHAT IT TESTS: whether you understand recursive versus authoritative DNS and where a cloud DNS service sits. ANSWER OUTLINE: the browser checks local and OS caches, then asks a recursive resolver; the resolver walks root servers, the TLD servers for the domain extension, and finally your authoritative cloud DNS zone, which returns the A or AAAA record; results are cached at each hop for the record TTL. Mention that Route 53 or Azure DNS is the authoritative tier.
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- #dns
- #networking
- #route53
- #cloud
- #resolution
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