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2.4 SMT Machining Positioning Holes and Identification PointsA TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.当记得其中有‘曲则全，枉则直，洼则盈。写第一次亲密接触的时候不但要看，还要带入情感看，要硬把自己看哭。剧情描述了73岁的老人濑山克子某天离家出走在奇怪的照相馆拍摄了照片后，相貌突然回到了自己20岁时模样的故事。奋斗中的小镇青年遇到大城市的独居老人，同样孤独的两个人，不同的社会层次，不同的生活背景让他们之间矛盾频发、笑料百出，最终建立起跨血缘的深厚亲情。