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劳拉，来自马德里的西班牙律师，为寻找她失踪的妹妹萨拉，深入刚果丛林的钶钽铁矿产区，营救妹妹他是水军，他是打小广告的，但是他有素质啊，他没有欺骗啊。该剧主要讲述了1939年在晋察冀根据地，一群普通老百姓为了国恨家仇毅然奔赴战场的抗日往事.Roast steakTypical flow of the synchronous blocking I/O modelA 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.