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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).在宇宙中，像天罚大陆这样的凡间位面，数不胜数，其统称为：九天星域。九天星域中，九大仙帝统领九重之中所有星域。九天之上，乃炼仙神域，仙人最终化神之路，必要通过炼仙神域，方能凝聚神格，成为神，到达神界。神界万族林立，各族之神极为强大。在遥远的过去，神界万族，被始源至尊、混沌至尊，还有鸿蒙至尊统领。三大至尊，三足鼎立，统管神界、九天仙界。该片面向学龄前儿童，讲述了南瓜村里几个机器人小伙伴之间的故事，片中穿插有幼儿健康操。该片情节生动可看性强，三维制作效果较好，配音配乐较好。本剧改编自同名漫画，讲述待业生崔俊雄（金路云 饰）因偶然事故陷入昏迷状态，与正在执行特别任务的地狱使者具玲（金喜善 饰）、林龙九（尹志温 饰）相遇，他于是作为忙内进入阴间独家企业驻马灯的灵魂管理本部所属危机管理组工作，帮助那些陷入危机的人们的故事。