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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).一路南下，途径河北深州，顺路去见一见传道恩师。落跑甜心徐令娜（郑靓歆 饰）视短跑冠军寒飞（陈翔 饰）为偶像，后见他因故离别田径场，为鼓励他重返赛道，令娜女扮男装，用亡兄徐垒的名字来到寒飞的学校就读。不久，令娜的女生身份被寒飞识破，而令娜则借女孩的天生优势激励寒飞，经过一段时间交往，俩人感情迅速升温。同班男生柴格（陈晓柯 饰）生性粗犷，他对令娜这个清秀的“男生”产生了异样感情。花花公子姜潮（姜潮 饰）一度因暗恋寒飞的前女友贝芮（赵卓娜 饰）而大受情伤，而贝芮则以为寒飞仍爱着自己。贝芮是华冠女子学院的校花，身边从不乏追求者，伹经过一系列交往和观察后，她发现寒飞并不适合自已，真正能与之长相处的竟是之前并不看好的花花公子姜潮……HardLight　该剧改编自寐语者小说《帝王业》，讲述了王儇和萧綦历经朝政纷争，携手创家国、定天下的故事。万年之前，仙王牧云因持有诛仙图而遭人暗算，残魂沉睡万年之后，在天运大陆南云帝国有名的“废物牧云”身上觉醒。牧云初醒，就受到了学生妙仙语的刻意刁难，牧云轻松的就化解了妙仙语的陷阱，并举一反三的说出了更多的炼丹技巧，让门外的炼丹大师莫问赏识不已。回到家中，牧云得知了要与秦家小姐秦梦瑶结亲的消息。秦梦瑶寒毒在身，活不过二十岁，结亲不过是为了牧家和秦家的利益。但牧林辰的劝说下，牧云以炼丹为条件，答应了这门亲事。炼出了淬骨丹，牧云的修为有了第一次提升。莫问时常来找牧云请教，而秦时雨一直想请莫问来治疗孙女秦梦瑶。莫问暗示让牧云一试，牧云阴差阳错下唤醒了体内的诛仙图，得知秦梦瑶体内的并非寒毒，而是冰凰神魄。牧云治好了秦梦瑶，冰凰神魄的力量使得秦梦瑶修为突飞猛进。在见识到了牧云的能力后，秦梦瑶对牧云充满了好奇和兴趣，于是成为了北云学院的导师，和牧云教导同一个班级。而追求秦梦瑶不成的东方玉，嫉妒仇恨之心燃起，誓与牧云势不两立。 牧云借着诛仙图突破修为，去北云山脉历练，妙仙语执意同行，途中牧云以一人之力猎杀十几头紫毛猎狼，让妙仙语十分震惊。而被人指派暗杀幕运动柳山四煞一路尾随，趁牧云脱力之机会，纷纷现身准备对牧云下手。伯明翰警察迪·拉希塔·雷（DiRachitaRay）接手了一个迫使她终身面临个人冲突的案件。