With the World Wide Web, all websites have a unique Domain Name or a URL Uniform Resource Locator. These URLs are assigned a set of unique numbers called IP numbers or Internet Protocol Numbers. All Web Servers use this individual I.P. address to identify and connect the Website to the end-users: You, the Internet surfer.
While one cannot normally choose or change the I.P. Address of the Website. We can select a Domain and the domain ending extension, TLD
For a simple example, a domain name is our postal address and the TLDs could be called the zip code.
What are Domain Names
Our website address or domain name is similar to a Contact entry in a phone book. We assign a Name to a Number and use the contact's name to connect the phone number to the entity. We can choose what we want to save the contact name as, but the phone number stays the same. Similarly, we can select our domain name but not the I.P. address.
Top level Domain Names
Second level Domain Names
Website Address - URL