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Judging from the harmfulness and attack behavior of DDoS, we can divide DDoS attack methods into the following categories:Mental Representation Helps to Explain Information//093House医生和他经过精挑细选的专家组成的团队，最拿手的是诊断重症病人和处理神秘和危机的不明疾病。只有最严重和从未听说过的病症才会由他们接手。他们负责诊断，判断是否合法，尽全力营救病人的生命。但是在这部电视剧里，house和他的团队仍然显示了他们乐观搞笑的一面，爆出了不少笑料。In the case of a reflection attack, An attacker uses a controlled host to send a large number of packets, What makes these packets special is that, The destination IP address points to the server, router, and other facilities that act as reflectors, while the source IP address is forged as the target IP address, When the reflector receives the data packet, it will think whether the data packet is requested by the attack target, so it will send the corresponding data to the attack target. When a large number of response data packets flock to the attack target, it will deplete the network broadband resources of the target, resulting in denial of service attacks.Soft light mode. Whether to darken or brighten the picture color depends on the upper color information. The effect is similar to putting a scattered spotlight on the image. If the brightness of the upper color (light source) is higher than 50% gray, the lower layer will be illuminated (lightened). If the brightness of the upper color (light source) is less than 50% gray, the lower layer will darken as if it had been burnt.Behind both analysis and synthesis is classification ability. Analysis is to find differences in one class, while synthesis is to find commonality in different things, which is equivalent to the dimension of classification. In fact, the core of pyramid principle and structured thinking is classification ability. This is also why many people have learned pyramid principles or structured thinking, but they still cannot analyze and solve problems because they have not accumulated a large amount of knowledge in a certain field (declarative and procedural knowledge, situational knowledge) and do not have conceptual ability in the field.