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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.这里，还有这里……英布所指的正是渑池和洛水一线。杨长帆也已用出了浑身解数结交戚继光，自己最专业的无非机械技术，海事专业院校的重点与国防息息相关，无论舰船大炮，海事枪支马达，他绝不仅略知一二，是真的懂，而且绝对是整个地球上最懂的人，可即便把自己的认知吐露出来，依然只是不冷不热，难以调动戚继光的兴趣。……你认为金子就在这里？徐文长啼笑皆非，会吐出金沙的河流也在这里？在上游一些的地方，顺着河流向东北走，直到看到山谷。《台北歌手》（英文名：ROSEKI 1914），2018年台灣時代劇。由莫子儀、黃姵嘉、楊小黎領銜主演，於2017年開鏡，客家電視台於2018年4月2日上檔。本劇講述台灣第一才子呂赫若的故事。在墨尔本饥饿鬼节前夕，一个强大的护身符被打破时，一个复仇的精神体被释放出来，把死者带到了他身边。 当他们在整个越南澳大利亚人社区造成严重破坏，挽回失去的爱情并偿还旧的怨恨时，一个从未对自己的身份承担任何责任的年轻女子最终必须站起来接受自己的命运。郝婶早年丧夫，丈夫留下了一座大厦。郝婶带着大侄子郝运超，把这大厦出租。结果来了很多租客：苏逸涵（漂亮能干），钱涓涓（情妇），赖小满（富家千金），伍家宽（心理医生）。众房客在这座欢喜楼里，演绎出了一幕幕人间的欢喜剧……