Under Jacobson's algorithm which sought out to balance the flow rate (throughput) of each TCP stream, the system was more or less fair to everyone who wanted to use the network so long as everyone ...

TCP supports ECN, but many TCP implementations do not yet implement ECN. For more information about IP flow control, readers are encouraged to consult IETF RFCs 791, 792, 896, 1122, 1180, 1812 ...