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Hebei ProvinceIf 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.Zero Day Input把剧场一瞬间染上实况录音空间，完全原创的歌曲puri首次的剧场动画片「歌的☆王子先生♪真的LOVE王国」。女主是一名大学生，在一次派对上意外的被人玷污，使她成为了全校八卦和嘲笑的对象，她决定改变学校这种有毒的文化。Netease Entertainment reported on April 19 that 2018 is the first year after the 19th National Congress, the key year to win the victory of building a well-off society in an all-round way, and the year to deepen the structural reform on the supply side. This year, CCTV will take on a brand-new mission with a brand-new image. The optimized and upgraded 2018 "Charming China City" will return with ingenuity in the second season. The "Charming China City-City Alliance" will emerge as the times require, demonstrating the strong social value of mainstream media.