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The Domain Name System, or DNS, is a remarkable distributed database that provides a mechanism for naming hosts on the Internet. It’s called the Domain Name System because it divides the global Internet into a number of administrative domains, each of which can be sub-divided according to the desires of its administrators.
At the top of the hierarchy are, appropriately enough, a series of “top-level” domains many of which will be familiar to you:
Each of these top-level domains has its own meaning which dates back to the beginning of the Internet:
.com Commercial entity, typically a corporation or small business.
.net Traditionally, an Internet service provider. Today, anyone who wishes to register a .net domain is able to do so, regardless of whether they represent a computer network of any sort.
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