Where do software query reverse IP ?

ECO eco at club-internet.fr
Tue Nov 9 11:11:48 UTC 1999

  Let's suppose we have :
- a nameserver, ns1, authoritative for the domain example.com.
- www.example.com. A   ; And the reverse also...
  Some software after an A lookup do a reverse query to verify whether the
IP address matches the name or not.
  My question is : Will the software do a reverse query on ns1 for the IP as it found ns1 to be the master DNS server of
(www.)example.com ?

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