This method will do a file transfer between two remote ftp servers. If DEST_FILE is omitted then the leaf name of SRC_FILE will be used.
Have searched ftpclient library , apache commons net library , jsch library. Was able to find only a constant indicating the below
public static final int ACTIVE_REMOTE_DATA_CONNECTION_MODE
A constant indicating the FTP session is expecting all transfers to occur between two remote servers and that the server the client is connected to should connect to the other server's data port to initiate a data transfer.