Sends ICMP ECHO packets to hosts to determine whether they are
    active. Same as the PING command.

    Format

      LOOP  [ host ]

            [ /ADDRESS=xx.xx.xx.xx ]

            [ /ALL ]

            [ /FULL ]

            [ /NUMBER_PACKETS=n ]

            [ /PACKET_SIZE=n ]

            [ /PATTERN="hexadecimal-string" ]

            [ /[NO]ROUTE ]

            [ /WAIT=n ]