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Facing TCP's three-way handshake protocol, how should attackers launch attacks? The attacker first intentionally initiated a handshake packet. After receiving it, the server puts it into the waiting queue and returns an acknowledgement. Secondly, the attacker will no longer send the third acknowledgement packet, thus the server will make multiple retransmissions (the Linux system configures the number of retransmissions through tcp_synack_retries), consuming a lot of extra overhead, and the waiting queue will be occupied, even the waiting queue will be full, eventually causing the server to be unable to receive the client's request. This is the attack.当当地一个基督教小镇的电影院里的五名年轻员工发现地下室里藏着一部神秘的老电影时，他们释放出一个迷人的妖精，她给了他们性教育……用血写的。　　随着宝盒的秘密一层层被揭开，所有人都身不由己的被卷入到这一漩涡中。哑狼用生命保在未来的某一天，地球上除了Phil Miller，好像就没有别人了？！Leaders cannot rely on a single strategic approach to cope with multi-dimensional digital changes. Facing the subversive digital + intelligent power of the new generation of technology + commercial operating system AI-CPS OS, leaders must maintain a leading position in the three levels of industry, enterprise and individual:40个实习医生为了一个家知名医院（其实就是House那个医院）的3个转正名额进行无数轮的PK选秀，会是什么样的场景？如果你是House医生，肯定也会让这帮愣头青上演一出血战到底的真人秀吧？而且在被House老是修理一番后，他们会压根就不知道 “自尊”这个词是啥意思～(3) There are more than eight registered fire engineers, of whom at least four are first-class registered fire engineers;