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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).　　等兵都走了以后，大伙回到村里，发现村子竟然不仅没被洗劫，街道还被打扫干净，有的家里还留了现大洋作补偿，原来是八路军为了抗日挺进沂蒙山。鬼子真的来了，村里人都藏到了后山里。于大娘的三女儿三妮被日本鬼子强暴后残忍地杀害，村里李继财的媳妇也被鬼子祸害而跳崖自杀。愤怒的村民打死了一个掉队的鬼子。8. Riverside Park住在糟屋郡粕屋町的高中3年级学生未来，从被恋人和朋友背叛的过去开始，就不能相信别人，也不能恋爱。唯一能满足孤独之心的，就是一个人用吉他唱自己最喜欢的歌。未来用SHINO这个账号名，将自己唱歌的样子发布到SNS上。NBC宣布续订《芝加哥急救》第三季。一个一个带有寓意的故事，或许看完以后我们都会有所反省，开播以来至今收视率一直不低，作为深夜节目，有的集里面会有些恐怖的因素，不过却是说出了我们生活中的很多道理。Originated in Holland. In 1900, the 2nd Olympic Games began to be included in the competition.