ho fatto come dici scaricato DrTCP e ho lasciato tutto invariato ed ho messo su mtu(a proposito c'è ne sono due)e questo è il risultato dopo aver riavviato il pc.grazie


TCP options string = 020405960103030101010402
MTU = 1470
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.
MSS = 1430
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 128700
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled Receive Window = 64350

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
503360 (MSS x 44 * scale factor of 8)
251680 (MSS x 44 * scale factor of 4)
125840 (MSS x 44 * scale factor of 2)
62920 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 5148 kbps (643.5 KBytes/s) @ 200ms
Your RcvWindow limits you to: 2059.2 kbps (257.4 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 121 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)