NSE7 Enterprise Firewall Practice Exam 2025 – Your Complete All-in-One Guide to Exam Success!

An established connection in TCP is represented by a specific protocol state that indicates a successful three-way handshake has occurred, allowing for data transmission between the two endpoints. In the context of TCP, each state corresponds to a part of the connection lifecycle.

The associated state for an established TCP connection is characterized by the system being in a state where packets can be sent and received between the communicating devices. When considering the protocol states, the value corresponding to an established connection is indicative of the 'ESTABLISHED' state in the TCP connection management process.

Therefore, the designation "Proto_state=01" aligns with this established state, confirming that there is an active communication link. This state allows both sides to send and receive data freely, which is fundamental for reliable communication in TCP. Recognizing the correct state helps in understanding the behavior of TCP connections and their management in networking.