What are “inverse queries?
A3: With normal (“forward”) queries the domain-name system responds with an address (e.g., “192.0.34.162”) when given a name are (e.g., “www.iana.org”). Inverse (“reverse”) queries do the reverse the domain name system returns the name (“www.iana.org”) when given the address (“192.0.34.162”). While inverse queries are rare from a human perspective, some network services automatically do an inverse lookup whenever they process a request from a particular IP address, and consequently they form a significant part of DNS network traffic.
