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The attacker first completes the three-way handshake to establish the connection, but in the last ACK reply of the three-way handshake, the TCP window size is set to 0, and then a data request is made. When the attack target sends the request result to the attacker, it stops the data transmission when it finds that the TCP window size is 0, and sends out a TCP window detection packet to ask the attacker if the TCP window has been updated. Since the attacker will not update the window size, the attack target will always maintain the TCP connection and wait for the data to be sent, and continuously carry out TCP window size detection. When the number of controlled hosts in the botnet is large, Target's connection table will gradually be exhausted, resulting in denial of service.　　《芭莎男士》执行主编/时尚总监After completing the practical activities, everyone gathered together for lunch, exchanged what they had gained from the practical activities, and talked about what they thought were the shortcomings of the practical activities. We all talked freely about our own experiences. After returning to school, we took a group photo again in front of the public health building. Although we were already very tired, everyone had a confident and satisfied smile on his face.Deliberate practice is completely different. It has the following four characteristics:《少年康熙》是根据著名作家凌力的小说《暮鼓晨钟》改编的，讲述的是康熙少年时期的一段故事。从8岁登基到铲除鳌拜，再到平定三藩，康熙逐步巩固和建立起绝对的政权。本片真实地讲述了一名旷世天子成长的故事！　　爱新觉罗·玄烨，顺治的第三子，因得不到父母之爱，养成反叛……北方如何了？杨总督死守大同。