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61. X.X.4这一段饭，他也吃的比往常多。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.2. Dynamically add functions to an object and undo them dynamically. (Inheritance cannot do this. The function of inheritance is static and cannot be added or deleted dynamically.)蕾奥娜虽然没什么钱，但却充满了爱，在一次意外事件中，她得到了一张彩票并抽中了豪宅，自此她和家人的生活将发生天翻地覆的变化。然而，当蕾奥娜遇到邻居西尔维娅时，她很快意识到有些事情可能并没有想象中那么简单...新任深厦市市委书记郑毅然，坚决执行省委的指示，对国有资产的重组进行了调查，并要求公安机关和司法部门，给深厦市的经济腾飞创造一个稳定的社会环境。深厦市的经济能人兆辉煌，试图拉拢腐蚀郑毅然，试图在国有资产的重组中侵吞国有资产。但高度警觉的郑毅然识破了兆辉煌的一系列伎俩，并发现兆辉煌和深厦的几个未破的刑事大案有重大关系。在郑毅然的领导下，公安机关终于查证了兆辉煌刑事犯罪的证据。一个作恶多年影响了深厦社会秩序的犯罪团伙被打掉，兆辉煌受到了法律的严惩！该剧是根据法国生物学家阿尔芒于一八六九年在雅安发现世界上第一只大熊猫的史实改编。通过男主人公阿尔芒及女主人公林菁、藏族土司打索、羌女野樱桃、汉族赶马人王长根、川剧名角茶花、川女幺妹等向人们演绎了一出由保护大熊猫而引出的跨国、跨民族不同文化背景的人们情感交融的感人故事。这是中国第一次拍摄有关大熊猫的电视连续剧，在长达三个月的拍摄中熊猫一直配合到位，在剧中可以见到平时人们少为人知的熊猫的生活细节片段。剧中热情讴歌了中法之间人民的友谊及人与自然、人与动物之间互为依存的情缘。《国色天娇》不仅奏响了生命辉煌的自然乐章，展示了地球上一道雄浑亮丽的风景。同时，也是中法建交40周年的一份精彩献礼。