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　　3×08《Masks》：朋友和敌人齐聚维多利亚时代的伦敦，静候「见证者」的到来。Cole和Railly穿越时间展开追踪行动。Samp4_5, an example program, demonstrates the use of these time and date-related classes, and its runtime interface is shown in Figure 1.……练霓裳悍然拔剑，迎战武当众人。李胜男面对男友的求婚,一夜之间带着闺蜜不知所踪,至此3女与6男的追逐游戏感情。该剧讲述一群比坏家伙们更坏的人，然而就是这样一群人，却用专属于他们自己的手段为社会除暴安良。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.