Simplify the following text for a Grade 12 native English-speaking person.
Original: In computer networking , reverse DNS lookup or reverse DNS resolution ( rDNS ) is the determination of a domain name that is associated with a given IP address using the Domain Name System ( DNS ) of the Internet .
Simplified: Reverse DNS lookup ( rDNS ) is the process of determining the hostname or the host computer associated with a given IP address or any other type of network address .