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WeightliftingSYN 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.故事讲述是同名同姓的两名男子发生车祸，其中一人的灵魂居然跑到另一个人内，产生一体两魂而演变成为两个家庭的男主人。Magic Attack +34该剧注重悬疑气氛的营造，把悬念一直维持到每一次的真相大白，并且重点突出技术侦查、层层推理，剧中将展示大量的破案手段。涉及法医学、毒物学、DNA鉴定、痕迹学、指纹学、微量物证、现场分析、弹道学、法庭昆虫学、犯罪现场重建、文件检验、声纹鉴定、颅骨复原、犯罪心理测试等等多种法庭科学学科，引人入胜，惊险刺激。