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This leads to an obvious potential DoS attack. Incoming SYN packets will be allocated too many TCB and the host's kernel memory will be exhausted. In order to avoid this memory depletion, the operating system usually associates a "backlog" queue parameter with the listening interface, which maintains both the upper TCB number of connections and the SYN-RECEIVED state. Although this scheme protects the host's available memory from attack, the backlog queue itself brings a (small) source of attack. When there is no space in the backlog, it is impossible to respond to new connection requests unless the TCB can be recycled or removed from the SYN-RECIEVE state.把一座钢城沿长江由武汉搬到重庆,这是旷世之举。为抗日,陆,贺二家经历了,并结下了三代情缘。陆越和贺超,亲似兄妹.随父母,钢厂就是他们的。大家认定他们会是夫妻,可他们说,在"小"家我们是兄妹。在"大"家我们就是"夫妻"。这对"夫妻"正在圆父辈的强国梦。芭丽、佩雅和娜诺出生和成长在一个很小却很美丽的山城里，失去了母亲的姊妹们和爱她们的父亲一同生活，但父亲在她们母亲离世后精神一蹶不振，整天醉酒和赌博。他身无分文，女孩们不得不自己设法挣钱。父亲去世前让他们去孟买找他的一个好友瓦利阿。瓦利阿是个千万富翁，有着自己的工业王国。三姊妹的出现并不受到瓦利阿家族每个人的欢迎和善待，这些人希望她们三个能够回到她们以前的小山城去，三姊妹同瓦利阿大家庭中不友好的人抗争着，而这时她们的生活突然出现了转变……究竟在瓦利阿身上发生过什么事？而这新的城市、陌生的人、全新的生活方式会改变三姐妹吗？她们能经受起彼此之间爱的严峻考验吗？她们会继续在一起吗？她们能坚守不管发生什么都在一起的诺言吗？理论告诉我们权力越大,责任也越大;Successville is a surreal place with a high celebrity homicide count. DI Sleet enlists the help of a genuine celebrity sidekick to solve the latest high profile murder.Ctrl + N: create a new graphic fileDuring the establishment of a tcp connection, If the server returns syn and ack messages, The client does not confirm it for some reason. This is because the server needs to retransmit the syn + ack message and wait for the client's confirmation message until the tcp connection timeout. This state of waiting for the client to confirm the connection is usually called a half-open connection. The half-open connection will be kept in the connection table of the server until the connection is disconnected.