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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.《温柔的背后2》秉承了第一部的风格，用真实的故事讲述都市情感。剧中肖涵饰演的李歆是一个海外归国的留学生，思想前卫开放，个性独立，同时还有着与生俱来的叛逆。刚刚拍完由湖南卫视投资的偶像剧《一起来看流星雨》，剧中肖涵是个大姐大，与魏晨上演“姐弟恋”。同样也是时尚靓丽的造型，而在新剧《温柔的背后2》中肖涵不在做懂事的乖乖女，而是挑战叛逆，演绎一个热辣的“小姨子”，陷入了一段“崎爱”之中。What is a pattern? Simply put, skipping the proper plot advance (burning process), you can directly start fighting Lao Yi.富家子弟周通（许冠杰 饰）武功高强，到处仗势凌人，其妹妹周吉（吴君如 饰）也十分无理取闹。他们的母亲太君（许冠英 饰）一直想他们定性并能够成家立室。可是在周吉的新婚之夜，夫君林嘉声（黄百鸣 饰）忍受不了周吉而逃走了。自此，太君便茶饭不思，周通于是为母亲办寿筵冲喜，更想请著名魔术师大围高栢飞（张国荣 饰）助兴。与此同时白雪仙（关之琳 饰）乔装出来逛花市，与高栢飞一见钟情。白父（吴孟达 饰）得知事情后以为女儿已怀孕，便找到高柏飞提亲，却误以为周通就是高栢飞。当周通见过白雪仙之后，便誓要得到美人。母夜叉（毛舜筠 饰）从逃难的高栢飞与雪仙口中得知了他们的遭遇后，便假扮新娘教训周通。周吉的丈夫林嘉声成为了状元，周吉想与夫君和好，却遭到了林嘉声拒绝……不……我言辞也有些……对于杨长帆含情脉脉的双眼，徐文长实在不忍直视，避过头，能不能先松开手……杨长帆松手微笑道：现在好些了吧。唐伯虎神情凛冽，用着没有枪头的枪，迎向夺命书生。