<div class="gmail_quote">2012/1/12 MontyRee <span dir="ltr"><<a href="mailto:chulmin2@hotmail.com">chulmin2@hotmail.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Hi, all.<br>
<br>
<br>
I have one question about NS cache ttl.<br>
for example, I can get two different NS TTL like below. <br>
<br>
$ dig <a href="http://google.com" target="_blank">google.com</a> ns +trace<br>
<br>
<a href="http://google.com" target="_blank">google.com</a>. 172800 IN NS <a href="http://ns2.google.com" target="_blank">ns2.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 172800 IN NS <a href="http://ns1.google.com" target="_blank">ns1.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 172800 IN NS <a href="http://ns3.google.com" target="_blank">ns3.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 172800 IN NS <a href="http://ns4.google.com" target="_blank">ns4.google.com</a>.<br>
;; Received 164 bytes from 192.5.6.30#53(<a href="http://a.gtld-servers.net" target="_blank">a.gtld-servers.net</a>) in 173 ms<br>
<br>
<a href="http://google.com" target="_blank">google.com</a>. 345600 IN NS <a href="http://ns4.google.com" target="_blank">ns4.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 345600 IN NS <a href="http://ns1.google.com" target="_blank">ns1.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 345600 IN NS <a href="http://ns2.google.com" target="_blank">ns2.google.com</a>.<br>
<a href="http://google.com" target="_blank">google.com</a>. 345600 IN NS <a href="http://ns3.google.com" target="_blank">ns3.google.com</a>.<br>
;; Received 164 bytes from 216.239.34.10#53(<a href="http://ns2.google.com" target="_blank">ns2.google.com</a>) in 43 ms<br>
<br>
so, on resolving DNS, which NS record TTL will be cached generally?<br>
172800 or 345600?<br>
<br>
<br>
Thanks in advance.<br></blockquote><div><br>345600<br><br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>--<br>AP<br>