A Domain Name System (DNS) server converts recognized domain names into IP addresses, which computers use to connect to one another. When an application attempts to connect to a domain name, your computer searches the Internet for a DNS server to obtain the accompanying numeric IP address.
Windows 10 saves a copy of the information it receives from DNS servers locally on your PC to save time. This is referred to as the DNS cache.
The DNS cache is stored in system memory rather than a file on your machine. The system memory is cleared every time you shut down your computer, which helps to explain why restarting your computer solves so many problems.
To clear your DNS cache, all you need to do is to restart your computer.
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