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People have studied SYN attack prevention technology earlier. To sum up, there are mainly two categories, one is through firewall, router and other filter gateway protection, the other is through strengthening TCP/IP protocol stack protection. However, it must be clear that SYN attacks cannot be completely prevented. What we have done is to reduce the harm of SYN attacks as much as possible unless TCP protocol is redesigned.　　李饰演Elaine家的Julius，一个热爱牛排、苹果派、达拉斯牛仔等许多美式事物的男子。Louis和他很快打成一片，但Louis的一个旧日好友的出现让两人的友谊受到考验。还挺好听。故事发生在一个和我们的地球很相似的世界里，那里人们的灵魂变成灵神跟随自己。莉拉自幼（Dakota Blue Richards 饰）跟随身为约旦大学校长的叔叔一起生活，她热情、勇敢且富有正义心。一天科尔特夫人（nicole kidman 饰）要到北方去，希望莉拉能伴随身边。好奇的莉拉开心地答应。临行前叔叔交给她一个黄金罗盘，告诉她世界上只有一个人能读懂。莉拉从黄金罗盘中不仅能得到所问问题的答案，还了解到了自己的身世之谜。这一路上，科尔特夫人行为诡异，莉拉还发现在特尔特夫人的一份名单上赫然写着自己失踪朋友罗杰的名字！罗杰和其他孩子一样，被诱拐到极北之地成为科学试验品。莉拉找到时机逃跑出来，自己动身前去拯救罗杰……王夫人笑道：这是他一片孝心。The "deliberate practice" introduced in this book is based on purposeful practice, but on top of this, there is more emphasis.Basic Protection: That is, the traditional physical protection measures for safety, But not limited to physical defense, as well as management, Policy, software defense, Even protection against a security baseline should be counted as part of the base protection, As mentioned earlier, blocking is not as good as dredging. However, this does not mean that there is no need to block. In other words, the attack time added by basic protection to the attack source, as well as the shorter detection time and the shorter emergency time, can ensure the basic information security of an enterprise. The longer the attack time, the shorter the detection time and the shorter the emergency time, the lower the possibility of successful APT attack.