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这一次，德布拉甘萨彻底的崩溃了。Attackers use the controlled host to send a large number of PSH and ACK packets to the target, and the target will consume a large amount of system resources to continuously empty the receiving buffer, resulting in the failure to process the data normally.As above, the code uses the policy pattern to refactor the code. It can be seen that the code responsibilities are updated clearly and the code becomes clearer.Compared with other quite sophisticated network attacks, DDOS attacks are not only the use of attack techniques, but also a competition of resources, including network bandwidth resources and server resources. Without sufficient resources, it is nonsense to talk about defending DDOS attacks. Therefore, at present, the defense against DDOS attacks mainly lies in hardware protection, and software protection has little effect.4. Bai Jugang《猎鹰1949》主要讲述了解放初期，国民党残余势力不甘失败，派遣特务潜伏于刚刚解放的大西南，纠集土匪啸聚山林，伺机而动，我特务营营长燕双鹰（张子健饰），以过人的胆识，超人的智慧和对党绝对的忠诚，巧妙的与敌周旋，潜伏于敌人内部的故事。《猎鹰1949》又被看作钱雁秋执导的电视剧《英雄》的续集。