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板栗急忙道：让他进来。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.　　该剧改编自J·K·罗琳以“罗伯特·加尔布雷斯”为笔名创作的侦探小说系列，1-3集为《布谷鸟的呼唤》，4、5集为《蚕》。残念生物事典残念生物事典残念生物事典残念生物事典残念生物事典叶繁星年纪轻轻就成为知名主播，男友肖寒同样事业有成。繁星人前风光，心中却藏有隐衷。十多年前，妹妹意外走丢，母亲变得性格偏执，繁星为安慰母亲只能选择代替妹妹而活。闵四月的出现让繁星收获了难能可贵的友谊，而傅夏的追求则让繁星和肖寒的地下恋情经受考验。偶然间，傅夏发现繁星的男友是自己的舅舅肖寒，他只能忍痛退出，默默守护。繁星则发现四月暗恋的正是肖寒，惊愕之余竟又得知四月是当年自己丢失的妹妹，而收养四月的就是繁星的生母。得知这一切后，繁星只想独自扛起秘密，以维系所有人的幸福，但她的隐忍和努力在真相面前反而显得欲盖弥彰。怀抱着希望和坚持，她冲破重重误解，最终重建属于自己的完美人生。　　之后，陈超受孟菲的哥哥徐峰（谭俊彦 饰）雇佣，成为了他的助理，为了生活拼命打拼的他在不知不觉间冷落了李欣儿。与此同时，李欣儿意外结识了名为孙浩（边原 饰）的老总，孙浩对单纯善良的李欣儿一见钟情，随即展开了热烈的攻势，让原本心灰意冷的李欣儿感到不知所措。