Changes

'''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. Simply put, the DNS converts the names typed in the Web browser address bar into IP addresses. <ref>[http://compnetworking.about.com/cs/domainnamesystem/g/bldef_dns.htm DNS Definition]</ref>

==Overview==

==Overview==

==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. A domain name is a easy to remember and to handle for the Internet address. <ref>[http://www.modemhelp.net/faqs/dns.shtml About DNS]</ref>

Coordination across the Internet is maintained by means of a complex authoritative root system known as the [[TLD|Top Level Domain]], as well as the DNS  and other smaller name servers responsible for hosting individual domain information. For each domain, the DNS spreads the responsibility by mapping the domain names and assigning them into IP addresses, and vice-versa. This is accomplished through authoritative name servers which have been designated for each domain. Each authoritative name server is responsible for its own particular domain, but it has the authority to assign new authoritative name servers to any  of its sub-domains. The DNS is able to store many types of information, even the mail server lists for a specific domain. The DNS is a core element which ensures the functionality of the Internet through its distributed keyword-based redirection service.  

Coordination across the Internet is maintained by means of a complex authoritative root system known as the [[TLD|Top Level Domain]], as well as the DNS  and other smaller name servers responsible for hosting individual domain information. For each domain, the DNS spreads the responsibility by mapping the domain names and assigning them into IP addresses, and vice-versa. This is accomplished through authoritative name servers which have been designated for each domain. Each authoritative name server is responsible for its own particular domain, but it has the authority to assign new authoritative name servers to any  of its sub-domains. The DNS is able to store many types of information, even the mail server lists for a specific domain. The DNS is a core element which ensures the functionality of the Internet through its distributed keyword-based redirection service.  

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 <ref>[http://www.comptechdoc.org/independent/networking/guide/netdns.html DNS Structure]</ref>

* Domain name syntax: rules include in standards like [[RFC 1035]], [[RFC 1123]], and [[RFC 2181]]

* Domain name syntax: rules include in standards like [[RFC 1035]], [[RFC 1123]], and [[RFC 2181]]

* Name server

* Name server