Fedora and fallback DNS servers

One of the under-the-hood changes in the Fedora 33 release was a switch to systemd-resolved for the handling of DNS queries. This change should be invisible to most users unless they start using one of the new features provided by systemd-resolved. Recently, though, the Fedora project changed its default configuration for that service to eliminate fallback DNS servers — a change which is indeed visible to some users who have found themselves without domain-name resolution as a result.

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