Recursive DNS Resolution — Root to Authoritative

Recursive DNS Resolution — Root to Authoritative A sequence diagram generated by Archify. example.com A? A? (cache miss) delegate to .com TLD A? delegate to authoritative A? 93.184.216.34 · TTL 300 answer + cached For the TTL, the resolver cache answers instantly — no trip back to the root Client · stub resolver · Sequence participant Client stub resolver Recursive Resolver · ISP / org · Sequence participant Recursive Resolver ISP / org Root NS · . · Sequence participant Root NS . TLD NS · .com · Sequence participant TLD NS .com Authoritative NS · example.com · Sequence participant Authoritative NS example.com Legend request return default message