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In TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.The First World War lasted for 4 years and 3 months from July 1914 to November 1918. The war swept across Europe, Asia and Africa, with 34 countries and regions participating in the war. The population affected by the war reached more than 1.5 billion, accounting for 75% of the world's population at that time. The two sides mobilized 889 divisions with a total of 74 million troops, 8.4 million killed and 21 million injured.说不定自己好不容易建立起来的这一点好感，或者说可能的谅解都会灰飞烟灭，说不定会徐家的憎恨会更进一步，那样就更加的万劫不复了。Netflix推出的芬兰剧，一位才华洋溢的干探为了能够有更多时间陪伴家人而选择留在小镇工作，然而，他却不其然被卷入一连串令人困扰的谋杀案。四个美国大男孩吉姆、凯文、芬奇、奥兹即将高中毕业，但四人都还是处男。四人因此遭人嘲笑，他们亦耿耿于怀，发誓在毕业前要告别处男。他们在毕业晚会前就举办了一场派对，企图在派队上找到自己的女孩，告别处男之身。谁知告别处男并没有想象中简单，也没有按设想进行，他们总是在最后关头因为这样那样的原因而失去机会。毕业晚会即将到来，这是他们毕业前的最后一次机会了，四人又开始加紧准备步伐。怀揣着父亲教授的一套性知识的吉姆，最喜欢看图书馆性爱“圣经”的凯 文，最喜欢大龄女人的芬奇，还有多才多艺的奥兹，在这场派队中纷纷为自己的誓言而奋斗，于是有了笑料百出的一幕幕。Roast steak