Understanding Domain

What is a domain? and What is the function Domain? Examples of domains that www.google.com all Internet users already know, it is called with the following domain further explanation of Domain

Domain is given a unique name to identify the name of the server computer as a web server or email server on a computer network or the Internet.

Domain function is to facilitate the users on the internet at the time of access to the server, as well as used to remember the name of the server that you visit without having to know complicated series of numbers known as IP addresses.

Understanding Domain according to wikipedia:
A domain is a unique name (unique name) given to identify (to identified) name server computer as a web server or email server on a computer network or the Internet. The function Domain is to allow users on the internet at the time of access to the server, but it is also used to remember (to memorize / to store) the name of the server that you visit without having to know the row numbers complex known as an IP address (Internet Protocol address). Domain names can be defined as a union of a website such as for example "wikipedia.org". Domain names are sometimes known term URL, or website address.
Source: Wikipedia

Understanding Domain based Tech Terms
According to Tech Terms by Jeff Rutenbeck Domain name is a naming system that identifies each unique network server on the internet. For example http://www.apapengertianahli.com/. When the user or user type the domain name in the search box on the web browser, the name of the domain server (domain name system / DNS), a domain name system will process the request with domain names that you find on the internet, which makes it possible to connect the server directly and then download the content from the server to the user's computer.