An interactive concept flow for dns resolution is a chain of cached questions, from its assumptions through the main operation and boundary checks.
trace / request.md
readyDNS maps names to typed records through a distributed hierarchy. A stub resolver usually asks a recursive resolver to find an answer. That resolver may consult caches, follow referrals from root to top-level and authoritative servers, and return records with a time-to-live.
Use the stages in order to explain dns resolution is a chain of cached questions. Each stage makes one assumption visible: what the operation promises, what representation it uses, how state changes, which boundary can invalidate a shortcut, and what evidence confirms the result.
For a worked explanation, continue to the topic article and execution trace.
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