Date: 2022nov7 Product: systemd-resolved Keywords: journalctl, systemd Q. systemd-resolved[]: Using degraded feature set UDP instead of TCP for DNS server <ip-address> Also: <date-time> systemd-resolved[]: Using degraded feature set UDP instead of UDP+EDNS0 for DNS server <ip-address> A. This happened to me when my internet connection was down. When it came back up the messages stopped.