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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.　　村民们对于名人的到来欣喜若狂。有些人认定丹尼尔笔下的人物就是他们自己，对这位作家发出各种请求。根据安...(2) Exhaust energy公元前三千年前，神农部落成为天下共主，第八代炎帝榆罔掌握着天下的王集和盐田，也由此而掌控着中土的突枭、九黎、西陵、彤等各个部落。祭祀之日，炎帝在梦中得到神谕，西方将有一只部落迁入中土。神农的大祭司勐康预见到这只名叫有熊的部落中将有人会取代炎帝，有意将原本天象显示的大吉之兆谎称为大凶。于是有熊部落一族开始了被神农的鹰犬突枭杀戮和沦为奴隶的坎坷命运。A2.4. 2 Chronic eczema with mild symptoms does not affect sleep qualification.这是一个学弟暗恋学长却没有勇气流露真情的故事。任时光流逝，他的心从未改变。他会继续暗恋多久呢？沃拉帕特·朗格朗瓦塔纳只是一个过着普通生活的普通人，但他的心被一个他从大学时代起就暗暗钦佩的学长。波拉特·波提瓦特是一个很好的年轻人，很少说话。比起言语，他更喜欢通过凝视来表达自己的情感。即使他是一个安静的人，他也喜欢帮助别人，非常善良。沃拉帕特最近搬到了波拉梅特隔壁的房子，就在他开始第一年的大学生活之前。这可能仅仅是巧合或命运，但不仅他们的房子紧挨着，而且他们两人在同一所大学和同一系学习，即使他们在不同的年份。然而，学长的善良慢慢地一点一点地改变了隔壁学弟钦佩的目光，发展成了永远改变他们关系的爱情。讲述了侦察队刑警在女儿因事故死亡后，发现不能茫然等待法律措施，于是开始自己亲自破解女儿死亡案件的故事。