Domain Name System (DNS) is a hierarchical naming system for computers, consisting of a root zone (named in honor of C.D. Net, the company that developed it) and one or more divisions, such as second level domains (SLDs), hostnames, and domain names. It is used to translate human-readable domain names, such as www.
example.com, into Internet Protocol (IP) addresses.
In DNS, a domain is a hierarchy of subdomains and hosts. A top-level domain (TLD) is the most basic division of DNS. There are currently over 100 TLDs in existence. A second-level domain (SLD) is a subdivision of a top-level domain. For example, the domain name com is a second-level domain. It includes subdomains such as example.com and sales.example.
com. A third-level domain (3LD) is a subdivision of a second-level domain. For example, the domain name org is a third-level domain. It includes subdomains such as staff.org and newsletter.org.
DNS is a hierarchical naming system. The root zone is the most basic division of DNS. It contains the top-level domain name, such as .com. The second-level domain is a subdivision of the root zone. For example, the domain name com includes subdomains such as example. The third-level domain is a subdivision of the second-level domain. For example, the domain name org includes subdomains such as staff.
DNS is used to translate human-readable domain names, such as www. DNS is a hierarchical naming system. DNS is used to translate human-readable domain names, such as www.
