 | 1 | initial version |
It is the calculated window size on the system that sent that packet. Packets from the client will have the client's window size; packets from the server will have the server's window size. Packets from the sender wil have the sender's window size; packets from the receiver will have the receiver's window size. With every packet, each system tells the other one, "This is how much space I have for incoming data."
