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Judgment: There is only a strange card in the package, which seems to depict the schematic diagram of the earthquake, with the word "earthquake" written in the middle and the word "disaster" written on the opposite side.Facing TCP's three-way handshake protocol, how should attackers launch attacks? The attacker first intentionally initiated a handshake packet. After receiving it, the server puts it into the waiting queue and returns an acknowledgement. Secondly, the attacker will no longer send the third acknowledgement packet, thus the server will make multiple retransmissions (the Linux system configures the number of retransmissions through tcp_synack_retries), consuming a lot of extra overhead, and the waiting queue will be occupied, even the waiting queue will be full, eventually causing the server to be unable to receive the client's request. This is the attack.此次，陈启写《佛本是道》，并不是全文照抄，他把原作的前半部进行了大幅度的整合修改，对全书进行精雕细琢，力求弥补一些遗憾，呈现出一部尽善尽美的《佛本是道》。[Irrigation Nutrient Solution]这里的地段当然贵了，有钱也未必买得到。但是不要忘了，《倚天》原著中，明确写道张三丰当年不修边幅，不在意形象，经常被人称为邋遢道长。