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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.《雪域昆仑》是一部真实反映新疆与西藏阿里之间特殊关系的长篇电视连续剧，主要讲述的是新疆各族军民解放、守卫和建设西藏阿里的可歌可泣、感天动地的鲜为人知的故事。项伯道：章邯这次不惜得罪赵高的风险，启用李由，调动中原所有秦军，是下了血本，一场恶战在所难免。Showtime正式宣布续订《国土安全》第7季。由悠悠草影视和品格传媒联合出品，欢瑞世纪制作的女性励志传奇古装钜制《纨绔世子妃》　　Normal mode is also the default mode. There is no mixing with other layers.