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L deadly second phase未曾见过的，命运交错的恋爱喜剧，就此开幕！这么出去，没跟我说一声？杨长帆的话终于应验了，凤海尴尬低头：大少爷……给了赏钱，让小的上缴给家里一半，小的还没缴……多少？凤海摸了摸腰间：五钱。杨长帆当即笑道：瞧老兄说的，我这么赶着做，就是在等老兄来啊。Although this kind of attack has appeared for 14 years, its variants can still be seen today. Although technologies that can effectively combat SYN flooding already exist, there is no standard remedy for TCP implementation. You can find different implementations of different solutions to protect the application layer and network layer in today's operating systems and devices. This paper describes this attack in detail and looks forward to and evaluates the anti-SYN flooding methods currently applied to end hosts and network devices.2、精神创伤Information Theory: I forget which publishing house it was. It is a very thin book and it is very good. There is a good talk about the measurement of information, the understanding of entropy and the Markov process (there is no such thing in the company now, I'll go back and find it and make it up). Mastering this knowledge, it is good for you to understand the cross entropy and relative entropy, which look similar but easy to confuse. At least you know why many machine learning algorithms like to use cross entropy as cost function ~