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Blue: bluegrass*, Chinese ixora fruit …In fact, content-based products are not a very typical division method. I also spent some time summarizing and refining this sharing, which was not detailed due to space constraints. If you go down the line, it is estimated that it will take 3-4 hours.与他名将后裔，上柱国的身份和该有的胸襟并不匹配，这样的人不值得归附。可没变老多久，后面就又传来了叫嚷声，杨长帆心下骂了句娘，这仨混蛋怎么没完了，他刚放下翘儿回头就慌了。2. Zhang LiangyingThe 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.The policy pattern defines a series of algorithms and encapsulates each algorithm so that they can be replaced with each other, and the changes in the algorithms will not affect the customers who use the algorithms. It is necessary to design an interface to provide a unified method for a series of implementation classes. Multiple implementation classes implement the interface, design an abstract class (optional, belonging to auxiliary class), and provide auxiliary functions. The diagram is as follows: