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　　P.S：过去曾主演过两部系列电影《侠探杰克 Jack Reacher》及《侠探杰克：永不回头 Jack Reacher: Never Go Back》的Tom Cruise不会在剧中演出。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).过去：爱情、幸福、缘分。在第四季中，Nick失去了格林的能力，他将经历一场自我认同危机，如果他们能治好他，让他经历恐怖、或者令人震惊的治疗过程，他还想做格林吗？　　在骇人海兽肆虐的年代，凡是成功斩除怪物的猎人都会受到英雄般的对待。他们当中，最受人爱戴的就是伟大的雅各霍兰德。某天，年少的麦茜布兰伯偷偷溜上雅各传说中的船，意外成为他的得力助手。两人一起踏上精彩刺激的冒险，航向未知的水域，大笔写下历史。在一个大男人主义家庭长大的三兄弟，继承了父亲火星男的性格，却各有自己的理想和烦恼。老大张乃平（陈汉玮饰）的志愿是当老板，却屡战屡败，把婚姻也输了。阴差阳错的，竟然当起了陪月。