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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.胡钧可不是绣花枕头，以站立的优势泰山压顶，硬逼得黎章滚到一旁，才冷哼了一声，不再追杀他，重新一屁股坐回到林聪身边。　　小说《微微一笑很倾城》将被翻拍为日剧！该剧定名《灰姑娘上线啦！》(シンデレラはオンライン中!，暂译)，由中村里帆、濑户利树主演，并将于1月12日开播。原版小说讲述了A大计算机系花贝微微与同校师哥肖奈在游戏《梦游江湖》中结伴成亲，并在现实中相恋相守的故事。他现在需要的就是保持优势，继续占上风，他知道只要这样压制着平武，用不来多久对方的耐xìng就会减弱很多，到时候会自己格外有利。/strut (show off)《上错花轿嫁对郎》是根据台湾纯情女作家席绢的小说《上错花轿嫁对郎》和《请你将就一下》改编的。故事讲述了一个悬念迭起、妙趣横生的古代民间故事。相传在某个朝代的扬州，有两个美丽的姑娘，一个是城北富商的小姐杜冰雁，一个是城东武师的闺女李玉湖，二人同年同月生，又在同一天出嫁。富家小姐杜冰雁要嫁到林州，武师闺女李玉湖要嫁到金州。杜小姐未来的丈夫是柳州巨商齐府的三公子。三位才华出众的女性凶杀调查员在处理复杂的个人生活需求的同时，坚持不懈地解决犯罪问题。 街头聪明的侦探Jacqueline ` Jack " Cooper具有敏锐的调查技巧，但他的私生活却十分混乱。Stevie Hall侦探是杰克的良师益友，是一个思维敏捷的审讯者，即使在她平衡工作和复杂的家庭生活的同时。工作督察Fiona Currie是凶杀组令人敬畏的老板，他加班工作以确保司法公正，无论花费多少。