I think you're confusing the receive window (advertised by the receiver and measured in bytes) and the congestion window (maintained by the sender and based on

I think you're confusing the receive window (advertised by the receiver and measured in bytes) and the congestion window (maintained by the sender and based on acknowledged segments). https://en.wikipedia.org/wiki/TCP_congestion_control#Congestion_window https://en.wikipedia.org/wiki/TCP_congestion_control#Congest...