about the reference

Jeff Peng pengyh at inbox.com
Fri Jul 1 08:47:27 UTC 2011


Please see this reference:

$ dig mydots.net @j.gtld-servers.net

; <<>> DiG 9.4.2-P2.1 <<>> mydots.net @j.gtld-servers.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41902
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;mydots.net.                    IN      A

mydots.net.             172800  IN      NS      ns1.dnsbed.com.
mydots.net.             172800  IN      NS      ns2.dnsbed.com.

ns1.dnsbed.com.         172800  IN      A
ns2.dnsbed.com.         172800  IN      A

;; Query time: 196 msec
;; WHEN: Fri Jul  1 16:23:05 2011
;; MSG SIZE  rcvd: 106

j.gtld-servers.net gives the reference info about the domain mydots.net.
It says the dns servers for mydots.net is ns[1-2].dnsbed.com, following with two NS's IP addresses.

My question is, when other BIND Cache get this reference, will it use the IP addresses directly?
Or will it use the IP addresses get from the authoritative server?

I ask this because, when the IP addresses get from reference, are different from the ones get from the authoritative server, what will be happened?

Thanks for your kind helps.

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