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In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).《草原春来早》是由中国电视剧制作中心、内蒙古自治区党委宣传部联合摄制的革命历史题材电视连续剧，也是央视为了纪念2007年内蒙古自治区成立60周年推出的一部长篇巨作。《草原春来早》以我国老一辈无产阶级革命家乌兰夫的革命生涯为主线，集中展现抗日战争、解放战争中发生在内蒙古草原上的十多个重要历史事件，时间跨度长达30多年。《草原春来早》以我国老一辈无产阶级革命家乌兰夫的革命生涯为主线，集中展现抗日战争、解放战争中发生在内蒙古草原上的十多个重要历史事件，时间跨度长达30多年。唐嫣饰演“哈斯高娃”从大学毕业后成为德王的秘书，多次为战争进行出谋划策，到后来参加革命队伍，成为热血青年，人生几度发生转折，剧情跌宕起伏。林瑶按照惯例，出去买了一本《武侠世界》。[Collection Introduction]王穷同情地看着他，暗叹了口气。乾隆四十一年（1776），大小金川平叛急缺军饷。新任两淮盐政阿克占奉旨赶赴扬州，向富可敌国的盐商们催要捐输。下车伊始的阿克占发现了历任盐政瞒报的巨额亏空，并逐步揭露了震惊朝野的“盐引案”，一举将国舅高恒送上断头台。天子故交、总商汪朝宗从容应对，亲赴西南前线，送军饷、除瘟疫，解朝廷燃眉之急，又提醒阿克占因势利导，着眼长远，指出反腐败的根本出路在于改革。两人从对立走向合作。盐引案触动官场神经，招致疯狂反扑，一场殊死斗争在乾隆南巡的歌舞升平中悄然拉开，雪上加霜的是，汪朝宗亲自举荐的红颜知己姚梦梦，竟然乘机刺杀乾隆……