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SYN flooding attacks can attack with fewer packets than ordinary brute-force DoS attacks that only send a large number of packets to the target network. However, this requires some understanding of the server's operating system, such as how much backlog queue space it allocates and how long it will keep the TCB in the SYN-RECIEVED state before timeout and discarding the TCB. For example, an attacker can send a certain number of SYN packets that are exactly the size of the backlog queue, and their cycles are just the time when the TCB is recycled, thus making the server permanently unavailable.年轻教师王楠冲破重重困难来到大别山支教，她想把城市先进的教育模式带到大山里，以推进对山区孩子的全面素质教育。 在推行新的教育模式时，与校长张蔓产生分歧。王楠在学校受到委屈正要回城时，被师生们拦了下来。学生们向王楠讲述了校长张蔓为了他们能读书历尽千辛万苦的经历，王楠深受感动。但由于父亲生病王楠还是走了。到家见到父亲后挨了批评，要求她立即返回学校向张蔓道歉。后来，校长张蔓因胃癌晚期离世，王楠痛苦不堪，并决定留在山里，与同事们一起为教育事业贡献力量。天光云影花鼓响起，亲人大团聚，师生共欢颜。映山红再度开放，映山红小学的五星红旗再次冉冉地升起在蔚蓝的天空。The way of this attack is that the attacker can renegotiate quickly and continuously in an SSL connection, and the CPU overhead of the server is about 15 times that of the client when negotiating the encryption algorithm. If a large number of controlled hosts attack at the same time, the server will be busy negotiating the secret key and stop responding completely.　　为寻父亲失踪真相，集结众人踏上了一场险象迭生的冒险征程。该剧讲述了萧清、书澈、缪莹、宁鸣、成然和绿卡等人因为家庭、理想、爱情等种种原因相聚美国，成为藤校精英后，从象牙塔走向社会，一步步完成蜕变的故事。倭寇帐中，黑袍和尚坐在首席，左右皆是倭人头目，面目凶狠指着和尚怒骂。