The Domain Name System (DNS) is a distributed database system that resolves domain names to IP addresses. The DNS is critical for the functioning of the Internet, as it allows devices to communicate with each other by translating domain names into IP addresses.
One of the DNS’s primary functions is to provide name resolution for Internet Protocol addresses. Domain names are the Uniform Resource Locators (URLs) of the World Wide Web. A domain name is a string of characters that identifies a site on the Internet. For example, the domain name “www.
google.com” is the URL for the Google homepage.
The DNS resolves domain names to IP addresses. Domain names are divided into two parts, the top-level domain (TLD) and the second-level domain (SLD). The TLD is the part of the domain name that is always shown to the user. For example, the TLD for google.
com is “com.” The SLD is the part of the domain name that is shown to the user only if it is different from the TLD. For example, the SLD for google.com is “google.”.
The DNS uses a hierarchy of servers to resolve domain names. The top-level domain server (TLDS) is the first server in the hierarchy. The TLDS is responsible for resolving all domain names in the TLD. The TLDS contacts the next server in the hierarchy, the second-level domain server (SLC). The SLC is responsible for resolving all domain names in the SLD.
The SLC contacts the next server in the hierarchy, the zone file server (ZFS). The ZFS is responsible for resolving all domain names in the second-level domain. The ZFS contacts the name server (NS). The NS is responsible for resolving all domain names in the top-level domain.
The DNS is a distributed database system. The DNS uses a hierarchical model to resolve domain names. The DNS uses a two-level hierarchy of servers. The first level is the top-level domain server (TLDS). The TLDS is responsible for resolving all domain names in the top-level domain.
The SLC is responsible for resolving all domain names in the second-level domain. The SLC contacts the next server in the hierarchy, the zone file server (ZFS). The SLC is responsible for resolving all domain names in the second-level domain.
