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别激动，还早。千万不要王婆卖瓜，自卖自夸。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.《美少女战士Crystal》第2期黑月篇将于2015年1月17日（周六）19:00在niconico动画等全世界同步发布。围绕美少女战士和幻之银水晶展开新的故事，请务必关注！喋血黎明又名解放贵州，是描述我解放军五兵团攻占贵州，废除了贵州的封建剥削制度，推翻了压在贵州人民头上的“三座大山”，历经反动统治重压的贵州人民站了起来，当了主人，贵州历史自此揭开了新的一页。Policy pattern refers to defining a series of algorithms and encapsulating them. However, policy pattern not only encapsulates algorithms, but also encapsulates a series of business rules. As long as these business rules have the same objectives, we can use policy pattern to encapsulate them.