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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.忽地感觉全身被一股大力勒紧，令她透不过气来。On February 26, Caijing magazine WeChat Public Number issued an article explaining and apologizing for the article "Spring Festival Chronicle: A Northeast Village with Worsening Illness": This article is one of a series of essays in Caijing during the Spring Festival. The organization of this series of essays is intended to relive customs, trace back traditions and describe changes in hometown through the Spring Festival. It was later learned that Gao Shengke did not return to his hometown this year, but was based on his past experience of returning home and telephone interviews during the Spring Festival this year. However, it was published in the column of "Returning Diary", which is not serious and wrong. For some of the stories of my hometown mentioned in the essay, the reporter also processed them in terms of time, place, character names and other details, which affected the accuracy of the article and made many improper expressions. Once the article was published, it was reprinted after the title was revised by other media and immediately spread widely, causing great controversy and negative impact. The editorial department of the media said that the essay articles, which were not strictly controlled and not strictly handled, were deeply sorry for the negative impact on the people in the areas mentioned in the article.Discovery频道的《追缉：炸弹客 Manhunt: Unabomber》虽然影评及观众数上都有不错的表现，不过Discovery频道CEO David Zaslav表示他们要退出剧集领域改为重新专注在真人秀类节目，最终此剧转交到电视台Spectrum Originals。)ps：第二更，算是补昨天的。红椒笑了一阵，才道：算了。越国尹旭崛起江东，刘邦称雄西北，田荣在齐鲁之地兴兵，突然之间感觉到西楚国四面都是敌人，虽然说不上千疮百孔，但是确实狼烟四起，丝毫不容忽视。