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Author: Zhihu Users临场！这是真实的（？）新的派出所女子的故事！现在，天启又按照‘天上仙子的形象，描画出小龙女。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.你能背得动吗？知道送她去哪儿？周菡咬牙背起秦淼，喘了口气道：这你别管。　　君臣二人一心玩乐，荒废朝纲，致使举国上下怨声载道，强梁四起。以及时雨宋江（李雪健 饰）为首的一八零八位好汉相继登上梁山，一众好汉闹江州、三打祝家庄、战青州。搅得大宋江山沸沸扬扬……金贤重将在剧中饰演时间旅行者，是一个年龄和出身都不明的人物，独自生存着，遇到女主之后逐渐发现人生的真谛。