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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.The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.第二次鸦片战争前夕，英国侵略者在我东南沿海屡起事端，战争迫在眉睫，急需军费，但朝廷库府拮据。　　俊，多次赋予他艰难的使命，而他每次都能陷入绝境而后生。 　　有着赌徒心性的祁子俊，凭着他的过人胆识和商业智谋，在官场同商场间巧为周旋，在清王朝同太平军间穿梭往来，经营着协军饷、办盐运、解税银、卖军火、贩军需等等同皇权关联的大买卖。 　　信奉攀附官宦、游戏官场的祁子俊正在春风得意之时，却不知自己始终被恭亲王奕昕玩于股掌之上，最后走向覆亡的悲惨命运。在江户时代，小石川疗养院是为了造福穷人而设立的。人们出于对所长新出去定（船越英一郎 饰）的恐惧和喜爱而称他为"红胡子"。此外，还有年轻的大夫保本登（中村苍 饰）、津川玄三（前田公辉 饰）、田山真一郎（铃木康介 饰）等人也加入了他的行列，如今他们都在为穷人治病而努力。在这样的疗养院里，新来了一位神秘的年轻女子亚美（优希美青 饰）。她是个女汉子，又有医术，乖僻的性格引起了一阵骚动。亚美的父母和红胡子过去曾有过恩怨。最终，红胡子的年轻时代被揭开了...而每一次，病人们都会带着秘密和痛苦来到红胡子和大夫们的身边...影片根据Anders Roslund 和Börge Hellström所著的瑞典畅销小说《Three Seconds》改编，讲述男主角Pete Hoffman是一个革新的罪犯以及前“特殊行动”组织的士兵，为了从监狱里释放出去和妻子女儿团聚，他参与了一项FBI组织的卧底任务，试图深入波兰毒贩集团在纽约的一桩交易，在这个过程中，他将回到自己试图摆脱束缚的Bale Hill监狱，而当一桩毒品交易出现差错，他的卧底身份也遭到曝光的可能... 影片由意大利演员、导演安德里亚·迪·斯戴法诺执导，其它卡司还有克里夫·欧文和美国说唱艺术家Common，目前正在前期制作中。离休赋闲的前柳城市文化局长苏伯涛和林颖一直以来过着儿孙满堂悠闲自得的日子。可是有一天，苏伯涛无意中从报纸上看到白丽云去世的新闻后，因情绪过于激动，突发心脏病住进医院。原来，苏伯涛和白丽云在20年前有一段情，这段情整整萦绕了苏伯涛和林颖夫妻俩一辈子，在这个问题上二人唯一的共同点是，他们始终瞒着自己的儿女们。