【单选题】
TippingPoint采用SYN-Proxy防范DDOS攻击时,给攻击方回应的报文为()。
A、SYN
B、SYN ACK
C、ACK
D、FIN
A、SYN
B、SYN ACK
C、ACK
D、FIN
A、syn-fin, syn-flood, and tcp-no-frag B、syn-fin, port-scan, and tcp-no-flag C、syn-fin, fin-no-ack, and tcp-no-frag D、syn-fin, syn-ack-ack-proxy, and tcp-no-frag