What is Domain ?

Domain, Sub-Domain, Park Domain, Ad-On Domain and Sub-Account Domain?

In general, a domain is an area of control or a sphere of knowledge.

1) In computing and telecommunication in general, a domain is a sphere of knowledge identified by a name. Typically, the knowledge is a collection of facts about some program entities or a number of network points or addresses.

2) On the Internet, a domain consists of a set of network addresses. This domain is organized in levels. The top level identifies geographic or purpose commonality (for example, the nation that the domain covers or a category such as "commercial"). The second level identifies a unique place within the top level domain and is, in fact, equivalent to a unique address on the Internet Lower levels of domain may also be used.

Strictly speaking, in the Internet's domain name system, a domain is a name with which name server records are associated that describe subdomains or host. For example, "whatis.com" could be a domain with records for "www.whatis.com" and "www1.whatis.com," and so forth.

3) In Windows NT and Windows 2000, a domain is a set of network resources (applications, printers, and so forth) for a group of users. The user need only to log in to the domain to gain access to the resources, which may be located on a number of different servers in the network.

Sub domain

Lets say your domain is aurino.com, you install a Message Board and put in in a directory called aurino.com/board/. You can turn the directory board into a sub-domain by adding it as a sub-domain from your Control Panel. Now you can access your Message board as either  aurino.com/board
OR
board.aurino.com

Let's say you own the domain, abc.com. A sub domain of that would be something like newsite.abc.com.

Parked Domain

• Suppose you have two domains aurino.com and other=site.org. The aurino.com is the domain of your website and you want to add other=site.org. You want them both to go to the same place. In other words, when someone types either www.aurino.com or www. other=site.org.com they will go to the same page(s) on your website. In order to have additional parked domains you need to purchase the additional domain(s). and Register Parked domains.
  
• Let's say you own abc.com, but you also own abc.net, abc.biz, abc.org, etc. You want these domains to also point to your same abc.com site so you "Park" them to your primary site. Another classic example for Domain Parking is if you owned one domain such as mycompany.com but for marketing purposes also used other domains like accountingservices.com or autodetailing.com, etc. There's many good reasons for using multiple domains with a single account
  

Add-On Domains

• You have two domains a aurino.com and other=site.org, and
  You want the two domains to be totally separate/independent websites. In order to have additional parked domains you need to purchase the additional domain(s). Register Add-on domains.
  

Sub Account Domain

If you manage multiple web sites and want to control them under one simple plan, you will need sub-account support. With a sub-account you may use either a sub-domain of your primary domain name (example: something.abc.com) or you can use an entirely different domain. Sub-accounts have their own unique web site, emails, CGI, PHP, MySQL, Stats, etc. for each sub-account, all connected by 1 single control panel.