Most packets are part of the ________ state.

• A. connection opening
• B. connection closing
• C. Both A and B
• D. Neither A nor B

Answer: (D)

In TCP communication, the connection lifecycle has three parts: opening, established data transfer, and closing. The opening phase is just a handshake with a few control packets to set up the session. The closing phase likewise uses a small number of control packets to tear the session down. The bulk of traffic happens once the connection is established, as data packets flow between the endpoints. Because opening and closing involve only a small set of control messages, most packets are not part of those phases; they occur during the established state. Since the options refer only to opening or closing, the correct choice is that most packets are part of neither, i.e., they’re associated with the established state.