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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.胡钧卷起衣袖，又松了松衣领，对她道：你把衣裳捂得那么严实干嘛，解开透透气。悲剧突然降临在平凡的三口之家。一切都源自那突然的一瞬间。妻子和女儿乘坐的巴士从悬崖跌落，妻子身亡，女儿有幸奇迹般生还。但是，事情超出了所有人的预料。获救的女儿的身体里，住的却是是妻子的灵魂。从此，丈夫不得不面对这种亦妻亦女的奇妙关系。剧本改编自风头正劲的超人气作家东野圭吾的长篇推理小说《秘密》。志田未来饰演身体里寄宿母亲灵魂的高中生杉田藻奈美。丈夫杉田平介由佐佐木藏之介出演。2010年之秋，两位相差25岁的演技派演员将杰出小说《秘密》搬上荧屏。妻子的灵魂进入女儿的身体后，丈夫对妻子的感情，对女儿的感情将发生怎样的变化。曾一度体验死亡的妻子，能否承受去挥霍爱女的人生。曾以为永失至爱的绝望中的丈夫，能否理解妻子的苦恼。夫妇的选择，亲子的羁绊，以及“爱一个人”的本质都为何物，一切都将通过这部深刻而细腻的“家庭之爱的故事”拷问人心。随后财务就去转账，没有片刻，陈启的卡上多了五百万。Of course, for tourists who have lived in Japan for a long time or often come to play, it is quite convenient to buy a subway card.目光落到韩信身上，轻声问道：韩元帅以为呢？韩信眉角一动，表情不变道：担心的不是项羽，而是越国。堂堂的始皇孙女，本是秦国最尊贵的公主，却因为父辈的夺嫡篡位，流落在外。