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The 23 design modes, in fact, the predecessors have summed up the ways to solve the problem. Their aim is to ensure the low coupling and high cohesion of the system. The principles guiding them are nothing more than the design principles of packaging change, single responsibility, interface-oriented programming, etc. After that, I will continue to share my WCF learning process. Although there are many WCF series in the blog park, I felt that it was not necessary to write them before, and I felt that I could use them. However, I did not write them. I always felt that the knowledge was not my own and I did not feel in-depth. Therefore, I still want to write such a series. I hope all bloggers will support me more.Shanxi黑霹雳本名Jefferson Michael Pierce，在剧中他停止当英雄多年，但因为他女儿对正义上的固执，以及他的一位明星学生被拉进当地黑帮，令他只好重出江湖，再次当起义警 - 黑霹雳。在DC漫画中黑霹雳这角色在1977初登场，是首位主要黑人英雄，本人是名奥运会十项全能金牌得主，可以从指尖生成强力的电池能量球，他表面是位深受爱戴的老师，而另一面则是化身成正义联盟的英雄黑霹雳。他有两个女儿，Anissa（第三代雷电）﹑Jennifer（第三代闪电），分别是局外人战队及美国正义协会成员。他让一个护院赶雪橇，自己则拿了块喷香的猪脸子，用绳子拴了拎着，在雪橇前边逗引几条狗。DDOS attacks mainly occur in the network layer. Its most obvious characteristic is to send a large number of attack packets, consume network bandwidth resources and affect normal users' access. At present, the detection and defense technology for DDOS attacks in the network layer is quite mature, and at the same time, some new attack methods-DDOS attacks in the application layer have emerged. Different from network layer DDOS attacks, application layer DDOS attacks mostly imitate the access behavior of legitimate users and will not generate a large number of attack data packets during data transmission, but they will consume server resources through a large number of database queries and other operations, which is more difficult to detect. According to the different attack modes, DDOS attacks include reflection amplification attacks in addition to ordinary flooding attacks. This type of attack often uses a legitimate server as a reflector, which sends a large number of data packets to the target, thus causing greater harm. At present, DDOS attacks against DNS servers are also common. Attackers often send fake domain names to DNS servers, consuming DNS server resources. At the same time, due to the recursive query mechanism in DNS servers, DDOS attacks against DNS servers have a large impact range.北宋皇帝赵祯（王凯 饰）得知将自己养大的当朝太后刘娥并非亲生母亲，而自己的生母乃是太后当年的婢女李兰惠，深感愧疚。为了报答李家，赵祯将自己最心爱的女儿徽柔（任敏 饰）嫁给了李家的子孙李玮。朝堂之上，庆历新政大臣和老派权臣之间针锋相对，斗争风起云涌，赵祯治国如执秤，权衡各方势力，为国事殚精竭虑。徽柔与陪伴自己长大的内侍怀吉（边程 饰）建立了深厚的感情，对志趣不和又木讷平庸的李玮万般排斥，终于与婆家起了冲突，不顾一切地夜扣宫门，打破帝国最严苛的规矩，引发滔天非议，司马光甚至要在大殿之上“碎首进谏”。赵祯一生悉心呵护的“言路通畅”、“监督国君”的风气，使得他在爱女之情和维护治国理念之间挣扎得遍体鳞伤。最终，公主以半疯狂的抗争，始终未屈服于“成为李玮真正妻子”的命运，却与怀吉永生不得相见。一个老汉看不过。