What is a domain/URL:A simple definition of a Domain Name/URL is that ist's the words you type to get to a webpage, for example google’s Domain Name/URL is google.com.
But you can also access Goggle's website by typing: www.google.com or http://www.google.com (http = standard protocol)
or https://www.google.com/ (https = security).
Where can you get a domain Name:
For FREE:An example of where you can get a domain name for free: (but often free domain names have advertising or extensions such as wordpress; YourFreeDomainNameHere.wordpress.com).
There are many places to get free domains names, but free domain names have extensions and often ads, but if you don't mind that free domains can be good solutions for you.
Buy A Domain/URL:When you pay or buy a domain, it will be named anything you like as link as it’s available, by available, meaning when you go to purchase your domain they require you to do a search before you can buy a domain.
The most commonly known website extensions are .com, .ca, biz, .org, .net, .info, .co.
List of all ICANN domain extensions can be found here, over time they have added quite a few options to choose from.
What is ICANN?
The Internet Corporation for Assigned Names and Numbers (ICANN) is an internationally organized, non-profit corporation that has responsibility for Internet Protocol (IP) address space allocation, protocol identifier assignment, generic (gTLD) and country code (ccTLD) Top-Level Domain name system management, and root server system management functions. These services were originally performed under U.S. Government contract by the Internet Assigned Numbers Authority (IANA) and other entities. ICANN now performs the IANA function. (source)
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