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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).An NBA game takes 48 minutes and is divided into four quarters, each lasting 12 minutes. A game takes about two and a half hours to three hours.　　随着真相大白，芮莹也痊愈了，一切仇恨得到化解，雅俐瑛和朱旺终成眷属。但婚后即将等待她的，除了不喜欢她的婆婆和朱旺的奶奶，还有过去的复仇经历，给婚姻和爱情蒙上的一层阴影……托德·施特劳斯-斯古尔森将执导新线影业新片[难道不浪漫](Isn’t It Romantic,暂译)。影片由蕾蓓尔·威尔森主演，讲述一位刻薄女孩的平凡生活一夜之间变作了充满浪漫的爱情喜剧，她也由此成为朋友们的话题中心。斯古尔森以拍摄喜剧见长，2015年他导演的[幸存的女孩]曾入围多伦多电影节。《对，就是那样》是韩国SBS电视台于2016年2月13日起播出的周末剧。由孙正炫导演，金秀贤编剧，李顺载、金海淑、徐智慧、赵汉善、申素律、南圭丽等主演何府的后院也是相当别致，几乎已经称得上园林了，小桥流水，凉亭树荫。Flame retardant mechanism