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小葱有些迷糊，不知如何回答。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).The following laxatives take effect 6-10 hours after taking (so don't write about diarrhea immediately after taking it = = at least let the medicine reach the intestinal tract):　　一色老师擅长研究犯罪，经常协助在查案中走进死胡同的镰仓警察破案。因为牵扯到魔怪与幽灵，所以镰仓的案件用平常手段是无法解决的。而精通心灵搜查的一色老师便因此成了名侦探。某天，警方托一色老师调查大富翁被杀案。那件案子看起来不是人类所能犯下的。九天神话动画版是一部原创国产动画。动画内容全部取材于中国神话，以大胆新颖的创意，搞笑诙谐的表现手法，全新演绎了中国传统神话的内容。将已经被认为是过时老土的中国神话，重新搬到大家面前，希望能够引起大家对于传统神话的一些新的认知，这是这部动画最初的出发点和核心思路。九天神话动画版由许多个不同的神话小故事构成，互相之间没有直接联系但是人物会交叉出场，这也是中国神话的一个特色。在大明及大清属国中落得如此下场的，琉球不是第一个，也不会是最后一个，但绝对是最彻底的一个。