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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.胡周早听另一个随从说了缘故，也害怕极了，急忙叫道：那是什么东西？不要拿过来。这种性格，真得可以和杨过擦出火花，以至于演绎出一场生死绝恋？很多人表示怀疑。　电视连续剧《唐山孤儿》是以震惊世界的唐山大地震，以及震后唐山人民以坚强的意志重建美好人生为大背景而创作的，全剧用温情而委婉的笔触，描写了灾难后人们克服心灵创伤、坚韧不拔地奋斗、走向健康人生的动人故事。有胆小的女子吓得尖叫不已。弄得鬼鬼祟祟的，你以为你娘不知道？板栗赔笑道：我这不是怕爹万一……有那个……张槐瞪了他一眼，道：怕你爹万一有啥事？要有也是你小叔有，你爹绝不会有。此剧讲述一个社会底层生活的临时工都江秀，在面对因酗酒把家暴当成家常便饭的爸爸快就死亡时所作出之抉择的故事。