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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.游戏设计师祝遥不慎打开还在开发中的“次世代VR系统”，却意外进入游戏世界，好不容易被仙界第一美男玉言尊上收为徒弟，结果又撞上一成不变的非玩家角色，发生了一系列啼笑皆非的故事。今天是电影上映的第一天，尽管电影院已经增加了《重生传说》的排片量，但是场场依旧爆满。What does this picture mean? It means that the prerouting "chain" only has the functions corresponding to the nat table, raw table and mangle table, so the rules in prerouting can only be stored in the nat table, raw table and mangle table.黎章一愣，急忙上前抱拳：属下听令。　　恋人绝情，寡妇多情，爱人真情，三个女人一个硬汉，演绎着人间真善美、假丑恶。