DNS is the acronym for Domain Name System, responsible for decoding the domain names of sites that people type into web browsers on IP numbers.
DNS operates primarily through two functions: examining and updating databases, and resolving domain names at network addresses.
The domain name distribution system began in 1984, and through it it became possible that host names resident in a database could be distributed across multiple servers, thereby reducing the load on any server.
DNS is based on hierarchical names and allows the entry of various typed data, in addition to the Host name and Internet Protocol (IP).
Because the DNS database is distributed, size is unlimited and performance does not change when other servers are added.
There are 13 DNS servers worldwide and without them the Internet would not work.
The DNS server translates names to IP addresses and vice versa, allowing hosts to be located in a given domain.
The DNS server is divided between primary DNS and secondary DNS, which is the backup of primary DNS.
