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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.赵高沉默了，几次欲言又止，这才道：陛下，并非捷报。解放战争时期，胶东半岛。风高月黑，山河村区委曲书记和区长全家被潜入的亡命匪徒暗杀，曲妻曹春梅和县敌工部张滔临危受命，分别接任区委书记和区长,誓严查凶手。春梅的妹妹春玲和弟弟到墓前向姐夫默哀。山河村的斗争十分尖锐复杂。匪首汪化堂等人隐藏在芦苇荡中观察着村里的一举一动，暗中联合村中蒋殿人等人，意欲反共翻天。汪匪外甥孙承祖假称在战场上牺牲，潜伏在村里从事破坏活动，其……Copyright All reprints must be approved by Excel Skills Network.该剧根据一部以色列剧集改编。美军士兵Nicholas在伊拉克失踪9年，人们都以为他已经战死，但是一份匿名情报帮助美国情报部门在阿富汗找到了依然活着的Nicholas。Nicholas返回家乡后，获得英雄般的礼遇,他的妻子Jessica（莫瑞娜·巴卡琳饰）和两个小孩更因能与他团聚倍感幸福，然而8年战犯生涯留下的创伤和折磨依然没有消逝。与此同时，中情局女特工Carrie再次收到匿名情报，称Nicholas可能已经叛变并将协助基地组织对美国本土发动秘密袭击。于是她一面跟经验老到的上司兼导师Saul Berenson（曼迪·帕廷金饰）联手展开调查，一面还要跟自负的副局长David Estes（David Harewood 饰）斗智斗勇。该剧已经被预定第二季，预计2012年播出。