Interesting information about domain names!!
 
A domain name locates an organization or other entity on the Internet, for example, the domain name www.example.com locates an Internet address for example.com at Internet point 192.0.34.166 and a particular host server named www. The com part of the domain name reflects the purpose of the organization or entity (in this example commercial) and is called the top-level domain name. The example part of the domain name defines the organization or entity and together with the top-level is called the second-level domain name. The second-level domain name maps to and can be thought of as the readable version of the Internet address.
FACT:  Domain names are only used on the human side of the interface; domain names are then resolved into IP addresses so they can be found on the Internet. Domain names are used to make it easier for us to remember addresses.

Domain Name System (DNS):

The Domain Name System (DNS) is the way that Internet domain names are located and translated into Internet Protocol (IP) addresses. A domain name is a meaningful and easy-to-remember handle for an Internet address.A www.whatis.com definition

gTLDs and ccTLDs:

Generic Top-Level Domains (gTLDs) are those domains used for general use, such as COM, NET, ORG, NAME, INFO, and are not restricted to a certain country or geographic region. There are currently 14 gTLD extensions. Country-code Top-Level Domains (ccTLDs) are those domains referring to a certain country; ccTLD extensions are made up of two letters based on the ISO 3166 Codes for the presentation of names of countries and their subdivisions.Such as jo (Jordan), ae (United Arab Emirates), eg (Egypt) and so on.

Electronic mail (e-mail):

E-mail (electronic mail) is the exchange of computer-stored messages by telecommunication. (some publications spell it email; we prefer the currently more established spelling of e-mail.) E-mail messages are usually encoded in ASCII text. However, you can also send non-text files, such as graphic images and sound files, as attachments sent in binary streams. E-mail was one of the first uses of the Internet and is still the most popular one. A large percentage of the total traffic over the Internet is e-mail. E-mail can also be exchanged between online service provider users and in networks other than the Internet, both public and private. (www.whatis.com definition.)

Website:

Sometimes the words website and domain name are used to refer to the same thing, therefore, it is important to differentiate between those two terms, domain name is a name which is used to make browsing the Internet easier, it is a pointer to a specific number (IP Address) on the Internet. A website is the collection of pages hosted on a server providing information and images to the user. An example for a domain name is www.tagidomains.com, and the page you are viewing now is part of TAGIdomains website.

IP Address:

It is an address to a certain computer on the Internet, whether it is a normal personal computer, or a server. IP addresses are used to identify each node on the Internet and communicate between each other. Computers do not understand anything except numbers, so they use IP addresses. To access a website, it is hosted on a web server, which has a unique and permanent IP address in order for other computers to be able to reach it. An example for an IP address is: 192.0.34.166

Nameserver:

It is a computer connected to the Internet containing entries for each domain name. Each domain name has an IP address, if someone wishes to access a specific website, he/ she types the domain name of the website, then the computer asks the nameserver about the IP address related to the domain name in question. So, nameservers have tables of domain names and their corresponding IP address