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Basically, made upA 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.A2 Surgical勇基（李政宰 饰）是个刻苦的喜剧演员，但他始终熬不到出头之日，却又不肯在低等的地方表演。因为儿子的早夭，使他与妻子朴贞燕（李英爱 饰）之间有种无言的隔阂。 不久，勇基发现了自己妻子有了不可道出的秘密，那就是贞燕得了绝症，而且时日无多。伤心的勇基决定为贞燕准备一份礼物——寻找妻子小时候暗恋的对象。他走访了妻子小时候的玩伴儿，到酒吧表演赚钱给妻子买补品，他默默忍受妻子的脾气暴躁。 出头之日到来了，他在参加的电视台节目即将面临成功了，妻子贞燕则先走了一步，离开了这个世界。他也知道了妻子当年喜欢的男孩到底是谁。3. Take your above three certificates plus graduation certificate, ID card and physical examination, and you can sign up for the lecture-that is, "lecture".在此之前，西楚国大军的凶猛进攻，已经对汉国造成非了很严重的震慑。Belgium: 30,000