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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).Zhang Xiaobo blinked after saying these words, After a pause and a sigh, Like every veteran interviewed, these are memories they don't want to mention again. His expression told me more that he must have remembered something more that made him feel heavy-hearted. I saw the details of his facial changes after writing the interview information just collected, and asked:这是关于一个女人的故事；这是一个关于多少有些与众不同的母亲的故事；这是一个有关拯救“富二代”的故事；这是一个，题旨健康、感人向上，多少有点呼唤和励志的故事。这是一部根据真实事件再度加工创作而成的长篇电视连续剧。都市、乡村、家庭、伦理……System.out.println ("Modified status:" + origi.getValue ());ホーム、スイートホーム 江口洋介 郷田ほづみ有一天，未来的视频收到了评论。“我是住在北九州市的山下直斗。我很感动”直斗（NAOTO饰）在急救急救员的工作中面临挫折，但却被未来的歌曲所拯救。骂三儿媳是荡妇，恨得牙痒痒。