Which state corresponds with proto_state=07?

The state corresponding to proto_state=07 is CLOSE_WAIT. In the context of TCP (Transmission Control Protocol), the CLOSE_WAIT state indicates that the peer has sent a connection termination request (FIN), and the local endpoint has acknowledged this request. However, the local endpoint is still waiting for the application to close the connection. This state is crucial in ensuring proper shutdown procedures are followed in network communications.

In TCP operations, the movement into the CLOSE_WAIT state typically occurs after a peer has finished sending data and has signaled its intent to terminate the connection. The application on the local endpoint must then take action to close the connection appropriately to transition to the next state. Understanding this state is important for diagnosing connection issues and ensuring efficient resource management.

By contrast, the other states listed correspond to different conditions within the TCP lifecycle. For example, LAST_ACK signifies that the endpoint is waiting for an acknowledgment of its own FIN from the other side after it has already sent a termination request. ESTABLISHED indicates a fully open connection where data can be transmitted in both directions. FIN_WAIT signifies that the endpoint is in the process of closing the connection but has not yet received acknowledgment from the other side.