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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.……无数男性书友已经激动得嗷嗷叫。本剧由青年导演赵水晶执导，陈辉主演的爆笑剧，此片结合《万万没想到》《屌丝男士》风格，将现实生活中囧人囧事呈现在荧屏之上，把生活中的每一个有意思的人和事，用夸张荒谬的手法进行疯狂自嘲自贱，达到了自娱自乐和娱乐大众的目的。本剧有相亲篇，公交车篇，夫妻篇，家庭篇，街道篇，办公室篇组成，真所谓的躺枪一上线，迷倒一大片。《草原春来早》是由中国电视剧制作中心、内蒙古自治区党委宣传部联合摄制的革命历史题材电视连续剧，也是央视为了纪念2007年内蒙古自治区成立60周年推出的一部长篇巨作。《草原春来早》以我国老一辈无产阶级革命家乌兰夫的革命生涯为主线，集中展现抗日战争、解放战争中发生在内蒙古草原上的十多个重要历史事件，时间跨度长达30多年。《草原春来早》以我国老一辈无产阶级革命家乌兰夫的革命生涯为主线，集中展现抗日战争、解放战争中发生在内蒙古草原上的十多个重要历史事件，时间跨度长达30多年。唐嫣饰演“哈斯高娃”从大学毕业后成为德王的秘书，多次为战争进行出谋划策，到后来参加革命队伍，成为热血青年，人生几度发生转折，剧情跌宕起伏。现在，我带大家直观的感受一下《笑傲江湖》。O记督查王志淙（黄日华 饰）和上司陈桂（蔡国权 饰）结为搭档，共同打击罪恶，弘扬正义。然而，当王志淙出差归来之时，却发现陈桂已经离职，而接任陈桂成为自己搭档的，竟然是平日里就同自宿怨良多的国际刑警高级督察梁家伟（罗嘉良 饰），再加上他们同时喜欢上了名为方小芳（黎姿 饰）的美丽导游小姐，彼此之间的关系更是水火不容，一场没有硝烟的战争似乎正要拉开序幕。就在这个节骨眼上，王志淙的旧搭档林永泰（陈锦鸿 饰）意外回归，可是，此时的他亦麻烦缠身，陷入了感情漩涡之中无法自拔。罪犯们可没有假期，繁华的大都市中，每时每刻都在发生着犯罪行动，人心涣散的O记能否再次齐心合力？天色暗下来，刘井儿提议回去。