The mainly contributions of this paper include these following four aspects: (1) It discusses the attacking principle, attacking mechanism and attacking modes elaborately and provides fundamental references to SYN Cookie scheme against SYN Flood attack.

• 本文研究的主要贡献在于以下四个方面:(1)对SYN Flood的攻击机制,攻击原理做了细致地分析,为SYN Cookie方案的提出提供了基本的依据。