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for *.com</lifelinename><activitybars><activitybar begin_t="14" end_t="16"/></activitybars></lifeline><lifeline type="object"><lifelinename>DNS
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Authoritative Server
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for *.example.com</lifelinename><activitybars><activitybar begin_t="18" end_t="20"/></activitybars></lifeline></lifelinelist><messagelist><message type="asynchronous" from="0" to="1" t="2" t_delay="0"><messagetext>user types "www.example.com"</messagetext></message><message type="reflexive" from="1" t="3" t_delay="0"><messagetext>DNS Cache MISS</messagetext></message><message type="synchronous" from="1" to="2" t="6" t_delay="0"><messagetext>What IP does "www.example.com"
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resolve to?</messagetext><response t="22">IP is xx.xx.xx.xx, TTL is n seconds</response></message><message type="reflexive" from="2" t="7" t_delay="0"><messagetext>DNS Cache MISS</messagetext></message><message type="synchronous" from="2" to="3" t="10" t_delay="0"><messagetext>What IP does "www.example.com"
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resolve to?</messagetext><response t="12">Refer to TLD server for *.com</response></message><message type="synchronous" from="2" to="4" t="14" t_delay="0"><messagetext>What IP does "www.example.com" resolve to?</messagetext><response t="16">Refer to Authoritative Server for example.com</response></message><message type="synchronous" from="2" to="5" t="18" t_delay="0"><messagetext>What IP does "www.example.com" resolve to?</messagetext><response t="20">IP is xx.xx.xx.xx, TTL is n seconds</response></message><message type="reflexive" from="2" t="23" t_delay="0"><messagetext>Cache result</messagetext></message><message type="reflexive" from="1" t="24" t_delay="0"><messagetext>Cache result</messagetext></message></messagelist><framelist><frame type="SD" widthfactor="1"><operand t="">DNS Resolution</operand></frame></framelist></sequencediagml>`
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