A temporary glitch in your network stack can often be cleared with a simple reboot of your device and modem. Systems using nscd may require sudo /etc/init.
Understanding How DNS Resolution Works and Common Failure Points
This problem occurs when your system fails to translate human-readable domain names into the numerical IP addresses that computers use to communicate. This process involves changing the protocol settings in your network adapter configuration.
Your computer first checks its local hosts file, then queries a recursive resolver provided by your internet service provider. Flushing the DNS Cache Your operating system maintains a local cache of DNS records to speed up future requests.
Understanding the DNS Resolution Process Inside Your System
Power cycle your router and modem by unplugging them for thirty seconds. You should see a confirmation message indicating that the resolver cache was successfully flushed.
More About How to fix dns issue
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