Which of the following characteristics represents a normal TCP packet?

A normal TCP packet is characterized by the proper use of control flags in the TCP header for managing the state of the connection. The FIN and ACK flags are specifically used during the termination phase of a TCP connection. When a session is being closed, a FIN flag is sent to indicate the end of data transmission, and an ACK flag is used to acknowledge the receipt of the FIN flag. This is part of the graceful shutdown process to ensure that both ends of the connection have successfully finished transmitting data.

References: This explanation aligns with the standard TCP connection termination process, where FIN and ACK flags play a crucial role123.