It shows receiving data, it doesn't show anything about sending data including congestion control. It doesn't even show the full TCP receive a packet process si

It shows receiving data, it doesn't show anything about sending data including congestion control. It doesn't even show the full TCP receive a packet process since acking a packet is ... in the code. I also don't see anything about the state machine that occurs during connection creation or tear down. etc. Calling what is in the link TCP is about like claiming to describe the entire postal system in three steps(pick up envelope that has been delivered to your mailbox, open envelope, read letter).