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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).人群分开，汪魁匆匆奔出来，一眼看见黎章，慌忙一把扯住，复转身往圈内挤，嘴里道：祖宗，你可来了。　　但赛特的训练一直不顺利，总是引起纠纷给村子里的人添麻烦。South Korean advertising model, actor, representative work of South Korean drama "Men in Pattern".游泳欣人如其名，热爱游泳，父亲游山年轻时是飞鱼，因此她立志成为游泳国手，努力苦练，但比赛时她往往因紧张而游不出佳绩，屡战屡败，但乐观的她依旧勇往直前。泳欣两岁时，母亲忽不告而别，游山从此性情大变，过着招摇撞骗的生活。幸好泳欣有前队友夫妇欧英雄与白娜娜照顾，两人有一个当帆船教练的儿子欧耀阳，泳欣暗恋他，并视他为偶像崇拜。 　　泳欣偶遇拉大提琴的王宇乐，对音乐一窍不通的泳欣不禁陶醉在他的音乐当中。宇乐的父亲很支持儿子追求音乐的理想，但因母亲王若云是黑市夫人，所以在父亲猝逝后，母子便陷入困境，被逼住进三房式组屋，并和泳欣成了邻居。游山受不了宇乐练习大提琴时的干扰，与王若云不时斗气，而泳欣也无法忍受宇乐是个生活白痴，百忙中常抽空去帮他们做家务。 　　从国外回来的Fei加入泳队，Fei属天才型泳手，成绩斐然，泳欣因此鞭策自己更加努力。Fei有一个热爱帆船运动的弟弟陈方，而教练就是耀阳。Fei自视甚高，但和耀阳接触后，开始对他有了好感，主动接近。 　　Fei的母亲Yvonne在泳会出现，原来她就是泳Judging from the harmfulness and attack behavior of DDoS, we can divide DDoS attack methods into the following categories:小说《微微一笑很倾城》将被翻拍为日剧！该剧定名《灰姑娘上线啦！》(シンデレラはオンライン中!，暂译)，由中村里帆、濑户利树主演，并将于1月12日开播。原版小说讲述了A大计算机系花贝微微与同校师哥肖奈在游戏《梦游江湖》中结伴成亲，并在现实中相恋相守的故事。