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The attack uses the method of sending a large number of domain name resolution requests to the attacked server, Usually the domain name requested to be resolved is randomly generated or does not exist on the network. When the attacked DNS server receives the domain name resolution request, it will first look for whether there is a corresponding cache on the server. If it cannot be found and the domain name cannot be directly resolved by the server, the DNS server will recursively query the domain name information from its upper DNS server. The process of domain name resolution brings a great load to the server. If the number of domain name resolution requests exceeds a certain number per second, the DNS server will time out to resolve domain names.　　什么是坏人，有标准答案吗？ 」此言一出，人群一片寂静Although the financing of the off-line and off-duty institutions has not formed an explosive growth in a short period of time, they have also received financing one after another, with the amount of financing being 10 million.杜明乐呵呵地说道：对。神魔族的后裔，毕生以消灭嗜血族为职志，个性沉默寡言，青年的血气方刚与狂气热情皆隐盖在冷漠外表之下，欲语之言全寄藏在时而孤寂、时而澎湃的小提琴弦音之中；以一双银枪为武器，悠悠弦音，是给予嗜血族的悲怜镇魂曲。他想起来彼此能够合作，有一个很重要的基础，那就是有共同的敌人项羽。