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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.It can be known from debugging that the this.channelFactory type is ReflectiveChannelFactory, and its newChannel method:　　开元盛世，当朝太子病重，所有太医束手无策，就在皇帝为太子秘密寻找药方之际，一位高人诊断称太子命格极为特殊，需带“佛骨舍利”皈依佛门，可皇帝不舍太子受苦，便命与太子八字相同的裴伦德代为出家，裴伦德心中虽有不满，但也不敢违抗圣令，只能放纵自己来舒缓愤懑的情绪。金光寺方丈预感到裴伦德恐遭灾祸重重，遂指派降魔武僧团的小伍一路护送裴文德，以保其安全抵达金光寺。玉剑山庄新月公主即将下嫁天王府始天王的消息一经传出，引起江湖上直我大波。楚留看决定静观其变，岂料新月公主突然失踪，所有矛头直指盗帅楚留香。一夜之间，楚留香被江湖各大抛力齐起攻之。盗帅百辞莫辨之下，只有承诺十天之内寻回机关报月。追查当中，狙击、杀戮不绝，究竟新月公主生死如何，楚留香又是否能如期交出新月呢我就是砸锅卖铁，也要打赏几个盟主。在未来世界，由于痛失爱子，天才科学家天马博士（尼古拉斯·凯奇 Nicolas Cage 配音）创造出了机械人阿童木（弗莱迪·海默 Freddie Highmore 配音），想以此来作为儿子的替身，寻找安慰。虽然，阿童木拥有博士儿子的情感和记忆，而且先进的程序还在不断完善其情绪，并让他富有同情心。可是，博士始终无法接受失子之痛，对阿童木也不能正确对待，并认为他不是人类而将其抛弃。阿童木沦落为无家可归的流浪儿，而且还备受军方的四处通缉，并最终被抓住。军方要求天马博士拿掉阿童木的能源，让它变成军方机器人的能源配备。在最后时刻，天马博士突然醒悟，并协助阿童木逃走。面对军方的围追堵截，阿童木奋起反抗，最终一场惊世大战一触即发。在不断的旅行过程中，阿童木也逐渐成长，他也接受了自己这机械与人类结合的设计，并肩负起全人类生死存亡的重任。熊孩子挑食不吃饭？没关系，来小虎厨房吧！带孩子们把各种食材做成好吃又好玩的美食，香糯的熊猫饭团，酥脆的小兔子吐司，是不是已经看花眼啦！来跟小虎哥哥，小小虎助手一起共度美味时光吧！