Which TCP flag is used to terminate an established connection?

Options

  • A. SYN
  • B. ACK
  • C. FIN
  • D. PSH
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

C. FIN

Detailed Explanation

Correct Answer: FIN.

The FIN (Finish) flag indicates that a device has finished sending data and wants to close its direction of the TCP connection. Normal TCP connection termination commonly involves a four-segment exchange.