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Http://www.jiemian.com/article/2011799.htmlIn 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).把事情交代清楚后，陈启离开了会议室。3. Enter the profile name and click OK该剧由前单口演员Dave Flebotte编剧及制作。讲述上世纪70年代的LA单口表演舞台。　　只要有李保全在身边，就算刘多贵依然纠缠在左右，海灵已经不再慌张，她终于找到让自己停泊的港湾，李保全和海灵关系越来越好，这对善良的恋人帮助了很多人，包括一个叫郭浩东的打工仔，郭浩东离开前对二人感激涕零。此时刘多贵也因为走私假烟被抓进监狱，海灵松了口气，觉得苦难应该都已过去，幸福的未来已经在向她招手。然而好龙陵中共地下党负责人、抗日游击队政委蔡凤琴，奉滇西特委指示，掩护、配合代号“蝴蝶”的重庆特工沈丽萍查找日军情报机构“芒市一号”。沈丽萍在蔡凤琴掩护下，以中医世家身份为掩护，借给岛田治眩晕病机会，赢得岛田信任。