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四个十几岁的朋友，在法国和瑞士边境，他们的生活被世界上最大的粒子对撞机LHC的实验搞得天翻地覆。TCB (TCP? Transport Control Block is a transport protocol data structure that contains all the information of the connection (in fact, in many operating systems, it is a queue used to process inbound connection requests. The queue holds TCP connection items that are in a half-open state and items that have established a full connection but have not yet been extracted by the application through an accept () call). The amount of memory occupied by a single TCB depends on the implementation of TCP options and other functions used in the connection. Usually a TCB has at least 280 bytes, which in some operating systems has exceeded 1300 bytes. The SYN-RECEIVED state of TCP is used to indicate that the connection is only half open, and the legality of the request is still questioned. An important aspect worth noting here is that the size of TCB allocation space depends on the SYN packets received-before the connection is fully established or the return reachability of the connection initiator is verified.Note: What is the difference between appearance mode, adapter mode and agent mode?---Body section---胡老大和葫芦哥同受重伤，一块被送进医馆。南极，一场坠机，婚庆公司老板吴富春（赵又廷 饰）和高空物理学家荆如意（杨子姗 饰）相遇，两个毫无共同语言的男女在南极腹地无人区冒险生存75天。在酷寒、没有物质供应、随处都是绝境的环境中，活下去已经变成每一天的最大愿望。在寻找救援的过程中，这对性格水火不容但命运却又相濡以沫的人，敬畏了自然，领悟了爱情。In the process of SSL handshake, no matter whether the data transmitted by the client is valid or not, the server needs to spend more CPU resources to decrypt and verify the validity of the data. Attackers can use this feature to carry out flood attacks.