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The sockstreet attack first completes the tcp three-way handshake the tcp connection is established, but in the last ack reply of the three-way handshake, the attacker sets its tcp window to 0 and then makes a data request. When the target discovers that the TCP window size at the receiving end is 0 when transmitting data, it will stop transmitting data and issue a TCP window probe packet to ask the attacker if its TCP window has been updated. Since the attacker does not change the size of the tcp window, the target will always maintain the tcp connection waiting for data to be sent and continuously carry out window update detection. If the attacker uses a large number of controlled hosts to carry out sockstreet attacks, the target will always maintain a large number of tcp connections and carry out a large number of window update detection, and its tcp connection table will gradually run out.10. Os.path.split ()--Returns the directory and file name of the path. Example:她是有预感的：前些日子，她总是特别想他，每次非得立刻见到他心里才踏实。Name of drug: Frangulae cortex有时候也要学会伏低做小，这叫‘好汉不吃眼前亏，不能受了一点委屈就吵嚷……红椒认真点头，难得地没跟他抬杠，眨巴着眼睛认真记娘说的话。