8.2 Example: The flow of a TCP packet leaving the Receiver through FCM

1. An application on the Receiver sends a packet to a host which is to be reached via the low-bandwidth link.
2. Receiver FCM calculates the window size in the following way:
   1. If Receiver FCM has a recorded representation of $p(q)$ and the TCP connection was established after receiving this, then the Client's algorithm is used to calculate window size.
   2. Otherwise, the default kernel window sizing algorithm is used.
3. The packet is created using the window size calculated, and is passed to an existing kernel module to be sent to its destination as would occur without FCM.