Answer:
Neither the attacker sends the final ACK of a session opening nor the attacker sends an RST segment
Step-by-step explanation:
In Transmission Control Protocol (TCP), if a receiver receives a damaged TCP segment, it does nothing and usually TCP session opening ends with an acknowledgement, ACK message.
Additionally, in a Transmission Control Protocol (TCP) half-open DoS (denial of service) attack, neither the attacker sends the final ACK of a session opening nor the attacker sends an RST segment.