A domain name is a "friendly" plain-text way to represent one or more numerical value IP addresses, the address that corresponds to a website name. An IP address represents a specific web server and/or web site on the Internet. A domain name may represent several IP address as needed to provide a complete set of web hosting or related services.

A domain name can be any combination of letters and numbers, and it can be used in combination of the various domain name extensions, such as .com, .net and more. 

The domain name must be registered before you can use it. Every domain name is unique. No two websites can have the same domain name. If someone types in www.yourdomain.com, it will go to your website and no one else's.

A domain name is generally broken into 3 parts:

e.g. http://www.ephost.com

1. The Top Level Domain would be the ".com". There are a finite amount of TLD's available. The common ones are .com, .net, .org. However, there are many more country specific ones, .com.br (Brazil), .co.uk (United Kingdom) and several industry specific ones like .gov (Government) or .edu (Educational Institutions).
2. The Second Level Domain is "ephost" which is the name used to identify one particular domain from another.
3. The Third Level Domain would be "www", which is optional. It is usually used to identify or separate different IP address locations, usually subdomains. e.g. http://support.ephost.com from http://www.ephost.com from http://forums.somesite.org

The "HTTP://" in the domain name represents the type of Internet protocol used which is beyond the scope of this document.

Domain names are obtained by leasing (paid) them for a specific period of time with a minimum of 1 year. You obtain a domain by registering the name with a Domain name Registrar or reseller. e.g. Network Solutions or EPhost, Inc.

Also See: Domain & DNS KB articles | Email Settings POP3 / IMAP | Check email online | Email Troubleshooting | Adding an email to your hosting account WINDOWS / LINUX

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