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The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.3. The same type of burning, although can superimpose attack power, but cannot superimpose time (with bleeding poisoning)西楚国的底气正在不断下滑…………荥阳，汉王刘邦颓然坐到在王位上，几乎要放声大哭。A Brief History of JavaScript Module EvolutionClick the metering button,　　李成宰在剧中饰演的是大学医院重症外伤中心的主任吴英哲一角。吴英哲连续三年受到了总统表彰，可以说是医学界的传说，被唤为“迈达斯之手”而受到敬仰的天才医生。但是在他慈祥的微笑下，又隐藏着冷静的面貌，拥有着双面的魅力。姜贤世是个没有梦想，没有明天的黑社会的成员。突然有一天，他的面前掉下一个遗产－－幼儿园。黑社会和幼儿园，世界上不会有第二个这样不协调的组合吧？这个幼儿园里有一个与姜贤世处处对立的女老师俞未来和严肃的监管老师高阿拉，还有一群可爱的小朋友。周边更有时刻盯着幼儿园的父亲和黑社会的老大。 姜贤世和他们之间到底会发生什么样的故事呢？到底母亲留下的伟大的遗产是什么呢？只是一所幼儿园吗？