Order and Preference Priority in DNS Responses

[Reindl Harald]

Am 03.08.2015 um 13:38 schrieb Harshith Mulky:
> I wanted to understand how Order and Preference Values have an impact on
> the answers Received from the DNS Server
>
> I am asking because, I have 4 records for NAPTR Query, as below
>
> carrier1.com 86400 IN NAPTR   50     50    “s”   “SIPS+D2T”  ““
> “_sips._tcp.carrier1.com.”
> carrier1.com 86400 IN NAPTR   90     50    “s”   “SIP+D2T”    ““
> “_sip._tcp.carrier1.com.”
> carrier1.com 86400 IN NAPTR 100   100   “s”  “SIP+D2U”  ““
> “_sip._udp.carrier1.com.”
> carrier1.com 86400 IN NAPTR 120    100   “s”  “SIPS+D2U”   ““
> “_sip._tcp.carrier1.com.”
>
> I am expecting to receive the answer as _sip._udp.carrier1.com but i
> receive _sip._tcp.carrier1.com

randomly

https://en.wikipedia.org/wiki/Round-robin_DNS

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