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Its specific UML structure diagram is as follows:SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.胖子急忙大声应道：嗳。一名孤独的探险家死去了，他那破旧的、包有皮边的笔记本便成为因时间而淡忘了的史前高原探险活动的惟一的线索。在伦敦，爱德华·查林杰教授召集了擅长不同领域的冒险家，组建了一支探险队，决心证实遗失的世界的存在，在地图上未标明的丛林中探险。在亚马逊丛林一片被时间遗忘的高原土地上，科学探险队的几位成员在寻找离开高原的路径。他们必须防御来自原始部落猎人们的袭击。他们在野外的高原上遇阻，无法返回，而这里又是一个令人害怕的世界，时常出没一些史前的食肉动物、原始的猿人、奇特的植物和吸血的蝙蝠。对研究史前生物的人来说，这里是天堂，而对普通的旅游者来说，这里却象地狱一样。但是为了生存，这群命运不济的人必须团结起来，抛弃个人之间的喜好和偏见，随时准备应付任何可能突发的情况。在野性丛林美女维罗尼卡的帮助下，手中只有几只猎枪的他们用智能一次又一次摆脱了死亡的威胁。Article 24 [Active Cooperation] When the inspected object accepts the supervision and inspection by the medical security administrative department, it shall actively cooperate and provide the required information as required, and shall not refuse the inspection, make false reports, falsely report or conceal.唐朝，梅岑山秘色瓷艺人余秀（牛犇 饰）为体弱多病的光王李怡（聂远 饰）烧制护身观音宝像供奉于五台山。宝像制成时，他捡到一个女婴，于是抱养回家为其取名为莲妹（李纯 饰）。人们说，女婴和观音宝像同来，是天意，是观音的人间示现……CBS一口气宣布续订6部正剧，包括《#庭审专家# Bull》第4季。