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1. DNS QUERY flood attackUnfortunately, I offended a hooligan. He sent 300 people into the restaurant at the same time. These people look like normal customers, each saying "eat quickly". However, the capacity of the restaurant is only 30 people, so it is impossible to meet so many ordering demands at the same time. In addition, they blocked the door, with three floors inside and three floors outside. The normal dining guests could not get in at all, thus actually paralyzing the restaurant.Franklin summed up his deliberate practice method!I am from Xiangyang, Hubei Province, born in 1983. In 2013, I kept crayfish for one year. The two ponds covered about 15 mu. Due to the high density of shrimps, the size of crayfish was close to 8,000 kg. In addition, those who ran to death lost 100,000 yuan. I'd like to tell you about my experience. Novices can learn from it.ResultsWe can call this object that specializes in Pizza a factory. Take a look at the implemented code: