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(3) Do a good job of performance appraisal every month, and start writing again. And write all kinds of materials according to the company's requirements at all times.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).少爷我还没回家，爹他们咋会吃饭？那不是不得团圆……呸，你这臭嘴巴。花冲是个大龄无业游民，这个世界上能管住花冲的人只有一个——他的五岁女儿花朵儿。花朵儿是一块橡皮糖，只要不上幼儿园，她无时无刻都要黏着爸爸才行：晚上要睡在爸爸身边，早上要爸爸给她穿衣服，和爸爸一起吃早饭，上幼儿园时必须是爸爸送，放学必须是爸爸第一个来接她，晚上必须爸爸给她讲故事才睡觉，只要爸爸在家，必须时时刻刻都在她视线内。最终，花冲浪子回头，在女儿的帮助下，成为一个称职的丈夫，一个好爸爸，一名职业保镖，并成立自己的专业保镖公司；女儿花朵儿也终于克服自己的小毛病，在爸爸的训练下，成为一个独立的好孩子。4 和美国或友或敌，致力扩张什叶新月，插手之多，无人可及陈启，这次真不好意思，我不知道他们会那样。PS4 has been updated with version 1.05. This post will supplement and test some key points of bow and arrow in the following aspects: