On 12/30/10 11:12, p...@mail.nsbeta.info wrote:
$ dig www.cnn.com @202.96.128.166
; <<>> DiG 9.4.2-P2 <<>> www.cnn.com @202.96.128.166
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65353
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.cnn.com. IN A
;; ANSWER SECTION:
www.cnn.com. 133 IN A 157.166.226.25
www.cnn.com. 133 IN A 157.166.226.26
www.cnn.com. 133 IN A 157.166.255.18
www.cnn.com. 133 IN A 157.166.255.19
www.cnn.com. 133 IN A 157.166.224.25
www.cnn.com. 133 IN A 157.166.224.26
;; Query time: 5 msec
;; SERVER: 202.96.128.166#53(202.96.128.166)
;; WHEN: Thu Dec 30 19:07:17 2010
;; MSG SIZE rcvd: 125
$ dig www.cnn.com @61.144.56.100
; <<>> DiG 9.4.2-P2 <<>> www.cnn.com @61.144.56.100
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10034
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 3, ADDITIONAL: 3
;; QUESTION SECTION:
;www.cnn.com. IN A
;; ANSWER SECTION:
www.cnn.com. 150 IN A 157.166.255.18
www.cnn.com. 150 IN A 157.166.255.19
www.cnn.com. 150 IN A 157.166.224.25
www.cnn.com. 150 IN A 157.166.224.26
www.cnn.com. 150 IN A 157.166.226.25
www.cnn.com. 150 IN A 157.166.226.26
;; AUTHORITY SECTION:
www.cnn.com. 86400 IN NS dmtns07.turner.com.
www.cnn.com. 86400 IN NS dmtns01.turner.com.
www.cnn.com. 86400 IN NS dmtns02.turner.com.
;; ADDITIONAL SECTION:
dmtns01.turner.com. 3608 IN A 157.166.226.169
dmtns02.turner.com. 3608 IN A 157.166.224.169
dmtns07.turner.com. 3608 IN A 157.166.255.15
;; Query time: 541 msec
;; SERVER: 61.144.56.100#53(61.144.56.100)
;; WHEN: Thu Dec 30 19:06:58 2010
;; MSG SIZE rcvd: 246
For the two queries above, why the second response has a "ADDITIONAL SECTION"
included, but the first doesn't?
Thanks in advance.
Regards.
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Because the 2nd response also included Authority Section, the additional data
are the addresses of the authoritative servers.
--
--Stacey
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