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秦枫色变，疾步抢出门，就见秦淼茫然看向屋里的张继明，身子摇摇欲坠，地上茶盏碎裂，洒落的茶水尚冒着热气。范鄂林不禁神色黯然，混到这个地步也着实是失败，北方草原苦寒之地去了可是受罪啊。刘蝉儿失笑道：这你也信？我跟你说，当娘的总是跟自己的娃儿说：你要跟那谁谁一样。徐阶就此沉一口气道：杨长帆与汪直，并无不同，只是胡宗宪卖国，而徐阶为国。托尼得势后他的性格开始变得疑神疑鬼，对周围的人甚至至亲的家人、好兄弟都充满怀疑。疑心使他逐渐走上了不归路！The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?In fact, each design pattern is a very important idea, which looks very familiar. In fact, it is because what we have learned is involved. Although sometimes we don't know it, it is actually reflected everywhere in Java's own design, such as AWT, JDBC, collection class, IO pipeline or Web framework, in which design patterns are everywhere. Because of our limited space, it is difficult to talk about every design pattern in great detail, but I will try my best to write down the meaning clearly in the limited space and space so as to make everyone understand better. If there is no accident in this chapter, it should be the last talk of the design pattern. First of all, it should be the figure at the beginning of the previous article: