On the TCP proxy and TCP reverse source detection, which statement is correct? (Select 3 Answers)

On the TCP proxy and TCP reverse source detection, which statement is correct? (Select 3 Answers)
A . Both TCP proxy and TCP reverse source detection can prevent SYN Flood.
B . The principle of TCP agent is that the device acts as a proxy between the two ends of the TP connection, when one of the ends connects, it must first complete the TCP three-way handshaking with the device.
C . Useing TCP proxy attack defense must open the state detection mechanism.
D . TP Reverse source detection detects the source IP by sending Reset message.

Answer: ABC