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If an attacker sends a large number of SYN requests with fake source addresses, the server side will consume a lot of resources to handle this semi-connection, and saving traversal will consume a lot of CPU time and memory, not to mention retrying SYN + ACK on IP in this list. TCP is a reliable protocol, and messages will be retransmitted at this time. The default number of retries is 5. The interval time of retries is doubled from 1s to 1s + 2s + 4s + 8s + 16s = 31s respectively. After the fifth time is sent out, it will take 32s to know that the fifth time has timed out, so the total is 31 + 32=63s.…,而且胶、东王和地位和势力范围和齐王绝对不是同日而语的，齐王可是田氏齐国的正统代表。A variety of schemes, the specific implementation can refer to the above introduction.? Set the methods in the above multiple factory method modes to static, and call them directly without creating instances.Industrial Revolution 2.0-Electrical Age: Since the 1870s, marked by the wide application of electricity, human society has entered the "Electrical Age" and initiated a new mode of mass production of products.不可预测的未来，接二连三的谜团，以及仿佛永远无法到来的救援队，让幸存者们不知所措……EW报道称，Netflix正式预定《惩罚者》的单独剧集，这一角色是在《夜魔侠》第二季中被引入的，惩罚者和艾丽卡为《夜魔侠》第二季增加了很多看点，现在罚叔也要有自己的独立剧集了。Jon Bernthal将继续扮演这一角色，其他角色和播出时间等都未知。