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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.该剧讲述的是嘴硬心软、犀利多金的霸道女总裁夏梦薇对帅气嘴甜、生活技能满点的小柜员顾言一见钟情、再见扒衣，霸总勇敢追爱，对小娇夫围追堵截，最终将顾言这只披着羊皮的小泰迪拿下的故事。感情稳定的特遣组高级督察陈小生（欧阳震华饰）与卫英姿（蔡少芬饰）终于确立了情侣关系。可英姿把重心都放在了事业上，希望争取机会晋升为督查。然而小生多年来一直渴望生儿育女的家庭生活，两人矛盾不断。而重案组警司邝梓键（林文龙饰）的出现，更让两人的关系陷入危机。接二连三发生的冲突与误会，让两人还是分开了。这时，法证科主任方晴（蒙嘉慧饰）走入了小生的内心。陈三元（滕丽名饰）再度身怀六甲，丈夫程峰（魏骏杰饰）在事业上也有了新的突破，升职为总督查，一切都在为迎接这个新生命做着准备。然而肆意扩张势力的黑帮“洪英社”日益猖獗，一场警匪大战蓄势待发。We all know that computers have a certain security protection system. Through the security protection system, computers can detect certain abnormal viruses and give reminders and removals. The DDOS attacker achieves its goal by evading this protection system and carrying out a rejection attack on the computer, thus bringing the other computer into its own control.在霓虹凡心这个故事中，当性和爱成为单调平凡的日常，出柜就已成为过往。 这个故事以五个同性恋挚友为主角，讲述他们如何在应对日常问题的同时体验爱，性以及友谊的含义。本作品描写了在江之电的某个车站男女相遇，以此为契机，被封印的“神秘齿轮”开始转动的模样，是一个家族和羁绊的故事。在一个小造船厂工作的永居小武，看到他的身影就激动不已，这是女大学生的经历？在车站被铃木千波搭话。千波即使成为恋人也不想让他和父母见面，知道了这个理由后受到了打击。于是，两人从各自难忘的过去中踏出了新的一步。这部剧集由《豪斯医生》的创作人David Shore联合《超越罪恶》（Breaking Bad）创作人Vince Gilligan共同开发，Mark Johnson和Bryan Singer联合制片。有这四个重量级人物做靠山，CBS赶紧将该剧收入囊中并直接给了剧集预订，订数为13集。该剧的创意由Vince Gilligan在十年之前提出，于2015年3月1日在美国正式上映，故事描述两个人生观和世界观迥然不同的侦探成为搭档的故事。