2012/1/12 MontyRee <chulm...@hotmail.com> > > Hi, all. > > > I have one question about NS cache ttl. > for example, I can get two different NS TTL like below. > > $ dig google.com ns +trace > > google.com. 172800 IN NS ns2.google.com. > google.com. 172800 IN NS ns1.google.com. > google.com. 172800 IN NS ns3.google.com. > google.com. 172800 IN NS ns4.google.com. > ;; Received 164 bytes from 192.5.6.30#53(a.gtld-servers.net) in 173 ms > > google.com. 345600 IN NS ns4.google.com. > google.com. 345600 IN NS ns1.google.com. > google.com. 345600 IN NS ns2.google.com. > google.com. 345600 IN NS ns3.google.com. > ;; Received 164 bytes from 216.239.34.10#53(ns2.google.com) in 43 ms > > so, on resolving DNS, which NS record TTL will be cached generally? > 172800 or 345600? > > > Thanks in advance. >
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