Each user knows how offensive it is when an Internet connection is lost. Everything seems to be in order with a computer or router, but when diagnosing problems, the system writes "DNS server is not responding." What to do in this case, not everyone knows. And before you make a decision to fix the problem, you first need to find out what exactly the failure may be associated with.
What is a DNS server: summary
First, a brief look at what a DNS server is. As you know, each computer or server connected to the Internet has its own unique IP address (if it is static and does not change). But you will not remember such a huge number of digital combinations to access a specific resource.
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A full-time antivirus will not work, so it’s best to use utilities like Kaspersky Rescue Disk, which check before the OS starts (they need to be written to removable media and loaded from it, setting the appropriate priority in the BIOS settings).