Wiki State Diagram. State diagram for congestion control in tcp. The sender and receiver both have to be ecn capable after negotiation between the sender and the receiver the sender sends the first tcp packet with both ece and cwr bits set to 0 the sender then.
Modified version of tcp state diagram with receipt of ack added as requirement for closing timewait and lastack closed transitions. Uml state diagrams are based on the concept of state diagrams by david harel. Description given in congestion control in tcp state diagram for ecn in tcp.
A state is an abstraction of the attribute values and links of an object.
For simplicity say it has only one flavor of pop. The sender and receiver both have to be ecn capable after negotiation between the sender and the receiver the sender sends the first tcp packet with both ece and cwr bits set to 0 the sender then. Its a behavioral diagram and it represents the behavior using finite state transitions. These terms are often used interchangeably.