Which TCP state is represented by proto_state=08?

The TCP state represented by proto_state=08 is LAST_ACK. In the TCP protocol, the LAST_ACK state signifies that the connection is in the process of being closed. Specifically, this state occurs when a TCP endpoint has received a termination request (FIN) from the other endpoint and has sent back an acknowledgment (ACK) for that request. While in this state, the endpoint is waiting for the final acknowledgment of its own FIN segment. This state effectively indicates that the connection is being gracefully closed but is not yet fully terminated until the final acknowledgment is received.

Understanding this state is crucial for troubleshooting and analyzing TCP connections, especially regarding connection termination processes and ensuring that resources are properly freed after a session ends.