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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.香荽便道：娘容我几日工夫，我再回话。Qinglan told Hexin that this was the last time he came to see him. Hexin grabbed the bars and made a scene. At the same time, the policeman also walked into the training center in order to see the river do good deeds and almost met Qinglan. He Xingshan gave the address of Qinglan's family to the patrol and begged him to persuade Qinglan. Koko asked Qinglan to give birth to a child as soon as possible. Qinglan replied that she did not understand the woman who was pregnant for marriage. Then Youmei came in and heard Qinglan's words. Health and Qinglan congratulated their marriage with Hyun Cha, Yi Shang and You Mei in the barbecue shop. You Mei said she was two years older than Qinglan and proposed to speak with honorific titles later, which was firmly opposed by Qinglan.故事是在曹院长倾其所有创建的“美好时光”养老院展开的，退休会计师贾老头性格倔犟，与儿媳妇闹别扭无家可归；退休京剧名角施老头与到海外的妻子离婚后守着大空房子孤寂难耐；身患绝症的刘董事长放下生意乔装追踪自己的私生女(在养老院搞卫生的梅阿姨)了却心愿；爱算计的“一劈二”小气庄老头爱飙车，与退休护士吴老太有情有意，却遭到双方儿女的反对，有家归不得；李处长一直受到老下级的误解，成贾老头的冤家(儿子李主播玩弄小婉的情感引众怒)。老处女韩美丽尽管不乏施老头等追求者，但一生痴痴等待自己意中人……他们尽管在自己的生活境遇中各有不同的烦恼与矛盾，但不约而同地都选择了到养老院寻找自己理想的生活。在他们身上发生了一连串啼笑皆非的幽默故事之后，施老头与前与妻破镜重圆；庄老头虽患上时好时坏的痴呆症，但终于与吴老太征服了儿女，再次领了结婚证；李处长与冤家贾老头冰释前嫌和好如初；韩美丽终于即将起程飞到意中人身边；大家喜爱的护士小婉失身后回归，接受了小唐医生的爱；梅阿姨认了父亲刘董事长，使养老院得到新生，演变成拥有500　　1927年4月12日，蒋介石发动了震惊中外的“四·一二”反革命政变。在反革命“清党”的腥风血雨中，板凳的大师兄常墩子身为一个共产党员，在执行任务的过程中惨遭敌人的杀害。临终前，常墩子将一个流浪儿红儿托付给板凳，板凳便由此踏上了“九死一生”的险途。故事发生在电影《美国队长》之后，1946年战争结束了，和平的到来反而使她被社会排挤。随后她加入了霍华德·史塔克的机构SSR (Strategic Scientific Reserve)，做一些行政和秘密任务。即使失去了史蒂夫·罗杰斯，她依然要面对人生。“特工卡特”首次现身银幕是在2011年的电影《美国队长》（Captain America: The First Avenger）中，当时由海莉·阿特维尔（Hayley Atwell）饰演这个角色，作为“美国队长”的恋人，卡特在前者撞机之后成立了“神盾局”保卫国家安全。2013年漫威曾制作《特工卡特》的电影短片，故事内容是关于美国历史上最令人震惊的十二宫连环案，而在《美国队长2：冬日战士》（Captain America: The Winter Soldier）中，卡特也曾短暂现身，不过此时的她已经是耄耋老人命不久矣。板栗转头，诧异地看向妹妹。