What is Domain ?

Each Internet site should be the title of his own digital works such as coordinates on the map, for example. The coordinates refer to a location on the map, this numeric address (IP Address) indicates the location of the site on the Internet
Domain name generally consists of three parts
The domain of second-class
Root or point
Area of ​​the first class
Arranged as follows: from left to right: second level domain, root, top level domain
Thus, if the domain name of your Class II: the second level, and choose “com” to him, you will need to add the “root” and this is your domain name is: com. Level II
In short, the domain name but not address, consisting of three parts reflect the digital address of your site

Domain names are arranged in a hierarchical manner is called (The DNS naming hierarchy) and is a system in the form of a tree in ascending order of the permit. Each represents a piece of this hierarchical naming system and managed separately by a specialized administrative unit. The root of this tree is called the period (.) In the term or the language of the DNS and underneath there is a second level domain name (or root level). Domain names of the top level, first, to be installed relative
And can thus any person to register a domain name in the form of: com, net, org. In fact many of the companies registered the three names in order to ensure the identity of its full

What is the DNS? Why do we using it ?

Internet domain names that are to address the numeric IP to approve it. The DNS database is distributed and repeated on multiple DNS servers, so when you change your address on behalf of the digital domain, the change takes a short spreads
Computers do not experience difficulty in identifying and remembering numeric addresses. By comparison, most people have trouble remembering the names of digital long and complex. So, to make navigation on the Web more easily, was the invention of a system of domain names. This system makes it easier to remember the names of web sites instead of the need to preserve digital sequences difficult