A DNS is a naming system that takes alphanumeric domain names (or “hostnames”) and turns them into numeric IP addresses. Essentially, DNS servers act as translators.
When you input a web address into your browser, it is forwarded to a DNS server from your router, where it’s then dissolved and returned as an IP address. However, if the DNS server is unable to properly complete this name resolution process, the end result is usually a message indicating that the DNS server is not responding.
“DNS Server Not Responding” means that your browser was unable to establish a connection to the internet. Typically, DNS errors are caused by problems on the user end, whether that’s with a network or internet connection, misconfigured DNS settings, or an outdated browser. They can also be attributed to a temporary server outage that renders the DNS unavailable.
Therefore, it’s possible that you might be able to resolve the problem simply by switching browsers. In other cases, you may need to disable connections, change DNS servers, or flush the DNS cache.