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'''DNS''' ('''D'''omain '''N'''ame '''S'''ystem) is the system used to translate alphanumeric domain names into Internet Protocol numbers.<ref>[http://icannwiki.org/Domaining_Glossary Domaining Glossary]</ref>

'''DNS''' ('''D'''omain '''N'''ame '''S'''ystem) is the system used to translate alphanumeric domain names into Internet Protocol numbers.<ref>[http://icannwiki.org/Domaining_Glossary Domaining Glossary]</ref>

==Short overview==

==Overview==

The DNS is made up of many servers and databases which, through a series of lookups in various caches, configure [[Domain Name]]s into [[IP Address]]es. The Domain Name System is a distributed database arranged hierarchically; its purpose is to provide a layer of abstraction between Internet services (web, email, etc.) and the numeric addresses (IP addresses) used to uniquely identify any given machine on the Internet. The DNS associates various information with the domain names assigned and, most importantly, translates the domain names meaningful to humans into the numerical identifiers that locate the desired destination.

The DNS is made up of many servers and databases which, through a series of lookups in various caches, configure [[Domain Name]]s into [[IP Address]]es. The Domain Name System is a distributed database arranged hierarchically; its purpose is to provide a layer of abstraction between Internet services (web, email, etc.) and the numeric addresses (IP addresses) used to uniquely identify any given machine on the Internet. The DNS associates various information with the domain names assigned and, most importantly, translates the domain names meaningful to humans into the numerical identifiers that locate the desired destination.

==How does it work?==

==How Does It Work?==

The DNS makes it possible to assign domain names in a meaningful way to Internet resources as well as to users, regardless of the entity's location. As a result, the WWW hyperlinks remain consistent, even for mobile devices.  

The DNS makes it possible to assign domain names in a meaningful way to Internet resources as well as to users, regardless of the entity's location. As a result, the WWW hyperlinks remain consistent, even for mobile devices.  

However, the DNS does not include security extensions, which was instead developed as [[DNSSEC]].

However, the DNS does not include security extensions, which was instead developed as [[DNSSEC]].

 

==The Structure of a DNS==

==The structure of a DNS==

The Domain Name System presents the following structure:

The Domain Name System presents the following structure:

* Domain space name: represented by tree of domain names with nodes and leaves

* Domain space name: represented by tree of domain names with nodes and leaves