I performed a DL FTP and observed that for every second DL FTP-DATA received from the FTP server, my PC sent a TCP ACK.
FYI, Window Size was all the time 65535.
So, it means that this windows size is not taken into consideration, as my Windows PC always constantly acknowledges every second FTP-DATA received from the server.
Server -> PC: FTP_DATA: 1460bytes (SEQ=x)
Server -> PC: FTP-DATA: 1460bytes (SEQ=X+1460)
PC -> Server: TCP ACK (ACK=x+2920)
Has anyone already observed the same behaviour ?
And is there any solution/workaround for this ?