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The printed board must be marked every time it is revised. Add a "*" after the version number for each revision.(3) A photocopy of the articles of association of the legal person and the ID card of theSYN 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.System.out.println (result);王尚书努力镇定心绪。必娶女人讲述的是，一个在你我生命中一定会遇到的「绊脚石」，那种专施小奸小恶来换取成功的--「必取」的故事。 女主角蔡环真，不仅为爱而与好姐妹胜男反目成仇，又设计陷害男主角郝萌，让他以为自己与环真发生超友谊关系，需要对环真负责， 正所谓女人不坏，男人不爱，可恨之人也有他的可取之处，这样让人恨得牙痒痒的「必取」， 最後会是如何扭转形象，蜕变成「必娶女人」，找到自己的必嫁男人呢？Modern Pentathlon