The act of trying repeatedly to connect to an unavailable FTP server with
little or no time between connection attempts. It can be compared to repeatedly hitting the "redial"
button on a telephone when dialing a phone number that is busy until the other
phone is no longer busy
Most FTP sites have policies against hammering and require FTP clients to set retry
times at specific intervals, commonly at least 120 seconds between each attempt to connect. Most FTP sites can also
monitor for devices that
hammer, and once detected the server will ban access to the offending IP address either permanently or for a limited amount of time.