Domain Name System (DNS) TerminologyDNSDomain Name System (DNS) is an Internet service that translates domain names into Internet Protocol (IP) addresses.Domain NameIt is the address where Internet users can access a website. A domain name points to an IP address, the address where Internet users can access a websiteHostnameA hostname can be an “A record” or a “CNAME.”Top-level domainThe top-level domain is the right-most label of a domain name.