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之所以答应召见随何，并非是一时赌气或者单纯地爱面子，而是英布经过深思熟虑之后做出的慎重政治选择。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 minimum distance between the edges of adjacent conductors in the same conductor layer.Lins Concubine 09森绘都本屋大赏年度第2作品<三日月>将拍摄日剧，永作博美&高桥一生共演，通过一个家族的50年历史，观察日本补习班的变迁。工藤阿須加、大政絢、壇蜜、黒川芽以、風吹纯加盟，2019年1月NHK放送。　　驚鴻俠影，群龍並起風雲湧。As the name implies, the decoration mode is to add some new functions to an object, and it is dynamic. It requires the decoration object and the decorated object to realize the same interface. The decoration object holds an instance of the decorated object. The diagram is as follows: