.COM: Short for .commercial. Domain names with the .com extension are by far the most popular, and can be purchased by any individual or business.
.NET: Short for .network, this domain extension was originally designed to be used by technical Web sites. However, domains using this extension can be registered by anyone.
.ORG: Short for .organization. Originally designated for non-profit firms and any other organizations that did not fit under the .com or .net extension, any individual or business may now register a .org domain name.
.BIZ: The .biz TLD is a designated suffix for businesses. Domains using the .biz extension must be used for business or commercial use. This suffix is fully active. http://www.name.biz has more information on the .biz suffix.
.INFO: The first unrestricted top-level domain since .com, .info domains are available to the general public. .NAME: Available to the general public,
.name email addresses are listed as firstname@lastname or lastname@firstname, while Web sites are listed as www.firstname.lastname.name.
DNS: Short for Domain Name System which is used to translate numeric addresses (known as IP, or Internet Protocol, addresses) into words.
Domain names: The word sequences users enter in their URL bar to visit your site.
IP Address: The numeric address behind a domain name that holds a websites real location on the Web.
HTTP: Stands for HyperText Transfer Protocol, the protocol by which HTML files move across the Internet. HTTP requires a client browser and an HTTP server (typically a Web server).