Iperf client module: it allows you to test connectivity with the server before installation, update or information back to the server. This module interacts with the iperf server module for the connectivity test and is launched by the java module. The tests are based on the Percentage of packet loss between the client and server. Thus, if the percentage of loss is less than 10%, the connection is good, otherwise if the percentage is between 10 and 50%, the connection is acceptable, otherwise if the percentage exceeds 50%, the connection is bad and updates are transferred to a shorter period (10 minutes) than the normal time (30 minutes), i.e. after a successful update.