isr.co.ro : glossary Address Resolution On the Internet, the translation of a symbolic address in the domain-name-system format, such as "you@yourdomain.com," to the actual IP (Internet Protocol) address, such as 127.1.2.3., used to route the messages. It's done automatically on your behalf by nameserver computers. When the process is unsuccessful--usually because of a bad or outdated entry--you get the familiar "DNS entry not found" error message from your Web browser or the "addressee unknown" bounced mail message from your e-mail program.