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In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.True or False"They will never give up halfway, try different ports, different protocols or carry out attacks from new sources. In short, they will never give up until they reach their goals. Tactics are always changing," he pointed out. "Enterprise users must understand and prepare for this fast and flexible feature of rivals."《新成长的烦恼》(又名《平民天后》)由美国迪士尼公司制作，是一部以青春期少年生活和学习为主题的电视剧。 
　　该剧以少女Lizzie（希拉里·达芙 Hilary Duff 饰）和她的同学Miranda（拉蕾妮 Lalaine 饰）、Gordo（亚当·兰伯格 Adam Lamberg 饰）的校园经历为主线，以Lizzie的弟弟Matt和父母的故事为副线，用轻喜剧的方式生动、幽默地向观众展示了美国中学生的生活状况和情感历程。十几岁孩子的那些不安分的小动作、口中说的时髦语言、个性鲜明的行为举止，以及青少年朋友之间的小矛盾等，许许多多发生在女主角Lizzie身边的趣事和青春期少男少女特有的尴尬、痛苦与挫折，都成为本剧吸引青少年观众的收视法宝。也让之前他们和项羽达成和平协议的事情，在道义上有些站不住脚，田横叔侄二人顿时有些羞愧了。C > Due to the internal optimization mechanism of the JVM, the JVM first draws some blank memory allocated to the Singleton instance and assigns a value to the instance member (note that the JVM did not start initializing the instance at this time), and then A leaves the synchronized block.