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2. How to realize the publish-subscribe mode?云玛集团总裁卫卿和美术系毕业生周是这对正在经历异国恋的情侣因为彼此的信任危机而分手。两年后的周是重新回到卫卿的世界中却与过去大不相同，为了重新挽回周是，卫卿想尽了一切办法，两个人从最初的的矛盾重重到最终的冰释前嫌，一路上的磨难让两个人再一次看清了对方的心意，也更加确定了对彼此的感情，两个人的关系变得更加坚固。而周是的两个好朋友，也在各自的成长中有了新的收获。女神林菲菲和艺术家甯非的相处更加甜蜜，学神毕秋静和学霸李明成也成为了幸福的三口之家。Cpu shutdown!1. Consumption by oneself and termination of transmission. -----> return true;In TCP protocol, messages arriving at the destination will enter the buffer of the TCP stack and will not be forwarded to the receiving system until the buffer is full. This is to minimize the number of times the system empties the buffer. However, the sender can force the receiving system to clear the contents of the buffer by sending a TCP message with a PSH flag of 1. The TCP PUSH + ACK attack, like the TCP SYN attack, aims to deplete the resources of the victim system. When an attacker sends TCP messages with PSH and ACK flags set to 1 to the Target host, these messages will cause the Target system to clear all TCP buffers (whether the buffers are full or not) and respond with an acknowledgement message. If this process is performed by a large number of controlled hosts, the system will not be able to process normal data, resulting in denial of service.Soon I saw Li Jianzhong's C # Object-Oriented Design Pattern Lecture on MSDN's Webcast. A very good series of lectures gave me a new understanding of design patterns. I realized that learning design patterns, specifically learning object-oriented design patterns, should start with learning object-oriented. "The principle of object-oriented is like understanding the rules of chess, and the design pattern is equivalent to a mess. I don't know what the rules look at." Since I have been doing ASP.NET development for the previous year, although I have been writing classes, learning Duwamish to make hierarchical architecture, typed DataSet and custom entity classes, it seems that I haven't used interfaces much in the past year, and I seldom use any polymorphism. In fact, the understanding of object-oriented programming is still very vague.不对，杜鹃颜色太平常了，看着不大纯净。