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PS: 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forums have seen beginners ask whether WCF still needs to learn in depth, because they think these technologies may be outdated.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.Discovery频道的《追缉：炸弹客 Manhunt: Unabomber》虽然影评及观众数上都有不错的表现，不过Discovery频道CEO David Zaslav表示他们要退出剧集领域改为重新专注在真人秀类节目，最终此剧转交到电视台Spectrum Originals。One thing to remind is that it is best to buy raw eggs in the import supermarket. In addition, the water in the pan is best boiled once and then cooled to 65 degrees before cooking at low temperature.Facing TCP's three-way handshake protocol, how should attackers launch attacks? The attacker first intentionally initiated a handshake packet. After receiving it, the server puts it into the waiting queue and returns an acknowledgement. Secondly, the attacker will no longer send the third acknowledgement packet, thus the server will make multiple retransmissions (the Linux system configures the number of retransmissions through tcp_synack_retries), consuming a lot of extra overhead, and the waiting queue will be occupied, even the waiting queue will be full, eventually causing the server to be unable to receive the client's request. This is the attack.剧中主人公易品和大自己二十岁的作家丁奇爱情长跑十年，终于得到了婚姻的承诺。婚礼当天，不堪束缚的新郎留下前妻的女儿草莓和出版公司老总庄言催稿的最后通牒，玩了失踪。易品接近崩溃，大学同学楚歌、白芒、小雨为了帮助易品，策划了一场“友谊追”。“友谊追”过程中，白芒百般努力却笑话不断，易品终于走出阴影，草莓也接受了易品。白芒因为“友谊追”的误会失去了樱桃，失落的他最终在网络游戏中遇见了女孩迷香。