World Wide Web - Conceptual Overview
Domain Name Server
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A Domain Name Server is a server computer on the World Wide Web that allows us to locate other computers on the World Wide Web using a virtual domain name (e.g. mysite.com).
The role of DNS servers is to map easy-to-remember domain names to the physical location of another computer where the website is hosted.
The nodes (i.e. computers) on the Internet are identified by an Internet Protocol address (IP Address) such as "213.2.1.23".
World Wide Web - Conceptual Overview
The mappings are replicated on many domain name servers around the world.
It can take as long as 24 hours for a new or changed domain name to propagate to all DNS servers world-wide.
