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宋紫，一个俏皮可爱的喵女孩，陆吾，一个外冷内热的帅气男孩，他们因为猫咪而经历了一场不打不相识的相遇。二人力求在喵星人和人类之间寻找一个相爱的支点，整个过程充满了人类与爱宠之间的治愈，令人暖意倍生，同时二人的日常相处也趣味横生，笑点不断。王穷见她开心的样子，十分好笑：之前说得口干舌燥，也没听她夸自己半句。小昭最后凝望着张无忌，凄然一笑。6 p: M # E "w 'l' d3] * LPS: Many forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated. Maybe Microsoft will launch a new SOA implementation scheme at that time. Wouldn't it be a waste of time to learn in depth, so they feel that there is no need to learn in depth and just know how to use them. I had the same feeling about this problem before, but now I think that although WCF technology may be replaced, the key to understanding a technology in depth is not to know some more advanced API calls, but to understand its implementation mechanism and way of thinking. Even if the latter technology is replaced, the mechanism behind it is definitely similar. Therefore, if you have a thorough understanding of a technology, you will feel familiar with the new technology and relaxed about it. In addition, after you have a thorough understanding of a technology, you dare to say that you have mastered the technology well during the interview, instead of saying that you use it a lot at ordinary times. Once you ask deeply, you do not know the implementation principle behind it. This is also why I want to write WCF series. I hope this opinion is helpful to some beginners.Fourth, due to the need to monitor teachers' course arrangement and class attendance online, with the increase in the number of students, the technical requirements for teacher management are higher.Take synkill. Exe as an example. Run the tool, select the random source address and source port, fill in the target machine address and TCP port, activate the operation, and soon find that the target system is running slowly. If the attack effect is not obvious, it may be that the target machine does not open the filled TCP port or the firewall denies access to the port. At this time, you can select the TCP port that is allowed to access. Generally, Windows systems open ports tcp139 and UNIX systems open ports tcp7, 21, 23, etc.