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Which SYN flood mitigation mode must the customer use?

A customer wants to enable SYN flood mitigation in a FortiDDoS device. The FortiDDoS must reply with one SYN/ACK packet per SYN packet from a new source IP address.

Which SYN flood mitigation mode must the customer use?
A . SYN retransmission
B . SYN/ACK cookie
C . SYN cookie
D . ACK cookie

Answer: C

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