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We use domain names to search for our favorite websites; we also bookmark them in our search browsers. We might even write and store them just in case something goes wrong with our machine. But why do we need to know a domain's IP address? We will need this information if we want to know details about the domain. What is an IP address? We must know the answer to this before we discuss what a domain's IP address is.
There is a database that contains records of all the websites that are on the internet. The IP address is what identifies one domain from another. Each domain is assigned a unique IP address. An IP (Internet Protocol) is a unique addressing system used to identify all machines that are using the internet. When you connect to the internet via any device; mobile phone, tablet, laptop, computer, etc. you are identified by an IP address. Without a unique addressing system operating and managing the internet would be virtually impossible. Imagine if you were living in an area where there are no house numbers, no street numbers or names. It would be impossible to find out where a person lives.