Need for Additional Records in a

Harshith Mulky harshith.mulky at outlook.com
Wed Jul 22 06:21:53 UTC 2015


Hello,

When we are getting Additional Section for a DNS Response like this, What is the need for this ADDITIONAL SECTION? Why is this ADDITIONAL SECTION returned? Is there a way to turn off these ADDITIONAL RESPONSE messages from the DNS Server?

dig _sip._udp.belur.inlab.com  SRV

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> _sip._udp.belur.inlab.com SRV
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62992
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;_sip._udp.belur.inlab.com.     IN      SRV

;; ANSWER SECTION:
_sip._udp.belur.inlab.com. 60   IN      SRV     0 0 11199 belur.inlab.com.

;; AUTHORITY SECTION:
inlab.com.              60      IN      NS      sbxlinux3.inlab.com.

;; ADDITIONAL SECTION:
belur.inlab.com.        60      IN      A       10.54.80.14
sbxlinux3.inlab.com.    60      IN      A       10.54.78.21

Thanks
Harshith
 		 	   		  
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