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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).本剧讲述了时尚集团独女为挽救公司危机，与各方势力斗智斗勇的励志故事。《猛犸敢死队》是以四十年代初中原一带女子敢死队英勇顽强抗击日本侵略者为主要内容。其寓意就是这支由女子组成的敢死队面对恶劣的环境条件，在敌战区内外神出鬼没奋勇杀敌，具有顽强的生命力的意思。　　抗战初期，国民党为阻止日军北上，成立了一支女子敢死队，代号“猛犸”。以国民党情报处特务营女上尉连长海娅娜为首的“猛犸敢死队”，在八路军武工队的率领下，开始了卓绝而又英勇的各种秘密抗日活动……一列日军军火列车在车站上被分装成两列火车。运往北部山区的火车在八路军武工队副队长于刚的指挥下，很快被引爆；另一军火列车，被敢死队秘密安装了定时炸弹，并利用车身的运行，炸毁了日军进攻路线上的桥梁和隧道。接着，他们营救通讯处长；铲除叛徒、营救博士；炸桥梁、窃药品……演绎了一曲曲可歌可泣的抗日战歌，为抗战胜利作出了贡献。蒯彻和自己的两名心腹侍卫也都没想到。你是黄豆哥哥？她试探地问道。