% time nc -vnz 1.1.1.1 53
  Connection to 1.1.1.1 port 53 [tcp/*] succeeded!
  nc -vnz 1.1.1.1 53  0,00s user 0,00s system 8% cpu 0,073 total

  % time nc -vnzu 1.1.1.1 53
  Connection to 1.1.1.1 port 53 [udp/*] succeeded!
  nc -vnzu 1.1.1.1 53  0,00s user 0,00s system 61% cpu 0,009 total