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Ensure that the discussion is focused and relevant;The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.1949年，第一野战军在大西北展开剿匪肃特斗争。解放军侦查连长王少强剿匪途中，遭遇西北军阀、匪首许殿亭之女许凌梅。四年前，王少强曾从日寇手中救出许凌梅，许凌梅对他一见钟情，并进入八路军卫生学校学习，两日后却被她父亲偷偷绑走，两人因此产生巨大误会。经过激烈碰撞和逐步澄清，两人慢慢消除了仇恨。王少强冒充匪特联络员打入许殿亭的豹头山，引导、教育许凌梅为我党工作，打探事关剿匪大局的许殿亭秘藏武器，破坏土匪行动，挑拨土匪内讧，给许殿亭、刘栓子等匪首以沉重打击；许凌梅也由任性、莽撞逐渐变得成熟。昔日“西北王”何步升卷土重来，许凌梅寻机打入何步升内部，与王少强内外配合，掌握了敌方信息。在解放军剿匪指挥部的统一指挥下，王少强和战友们将何步升等土匪武装剿灭殆尽。以陈国庆70年的经历为背景，以改革开放后创业经历为主线，讲述了随新中国成长的那一代企业家和时代交融变迁的故事。主人公经历了新中国成立，知青下乡，国营计划经济，改革开放，下岗潮，创业潮，转型升级以及品质商城的建立。陈国庆的企业家精神就是知青下乡时从农民身上学来的不怕吃苦和艰苦奋斗。而后又从国营厂里面开始学习各种专业技能，为以后的创业打下了扎实的基础，之后又下海创业再到后来转型升级，最终研发出了自己的专利。故事借助陈国庆这个人物，在反映当代企业家精神面貌的同时，也反映了新中国70年的历史变迁。故事也集中反映了我们中国这一代企业家独具特色的企业家精神由来，发展和变化，表达了独具中国特色的的工匠精神。R大苞谷实在是白担心了。　　坏老男人就千方百计地捉到三个小人（然后开杂技团赚钱），但总不能如愿