Diagnostics:
# NetworkManager
nmcli general status
nmcli connection show
# Resolver
resolvectl dns
resolvectl domain
resolvectl query fedoraproject.org
# Routing
tracepath -4 -b fedoraproject.org
tracepath -6 -b fedoraproject.org
# Connectivity/quality
ping -4 -q -w 10 fedoraproject.org
ping -6 -q -w 10 fedoraproject.org
mtr -w -b -c 50 fedoraproject.org