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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.　　康熙与钱香生出一段凄美动人的情愫……，怎知慕容春是“项庄舞剑，意在沛公”。就在宜妃不设防间，慕容春用毒花迷倒宜妃，并将易旺拐走。这可急坏了爱才如子的康熙，一行人决定出宫暗访。查到了一个营建在山洞里的人贩子集团。当地的官员昏庸腐败，对此事置之不理。康熙深入虎穴……只是他不说出来，我们也不得而知。招降这样的人很有风险，可以说是与虎谋皮。Second, how to make Word column evenly divided三只聪明且狡猾的老鼠，和一只家犬家犬生活在同一屋檐下，家犬看上去机灵聪明，却总是被这三只小老鼠整蛊，在家犬和三只老鼠你追我赶的日子里，从此有趣、滑稽的故事开始了……是继《猫和老鼠》之后，又一部搞笑之作哦！Eight Kinds of Traffic Police Gesture Signal Answering Skills