DNS, or the Domain Name System, is an integral part of how systems connect with each other to communicate on the internet. Without DNS, computers, and the people who use them, would be required to connect using only numerical addresses known as IP addresses.
Besides the obvious problem of having to remember a large number of complex numbers for simple tasks, communicating through IP addresses also causes some additional problems. Moving your website to a different hosting provider, or moving your servers to different locations would require you to inform every client of the new location.
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