Heu !
Une piste
Packet loss, fast retransmission and slow start:
1 packet is dropped when cwnd size reaches 16 packets. A fast retransmission happens when 3 duplicate ACKs are received. The cwnd is set to 1 MSS for a slow start. The sshtresh is set to max(flight-size/2, 2*MSS) for congestion avoidance. From Figure 2 plot 3 we can see the new value for ssthresh is 8 packets.
When new data ACK is received, cwnd increases to 2 MSS because of slow start and no sent unacked packets outside. 2 packet are sent.
Promis c'est pas moi qui l'ai écrit
:
http://www.ssfnet.org/Exchange/tcp/test/f4.html
WW