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In the process of DNS resolution, the client initiates a query request, and the DNS server may need to make additional queries to complete the resolution process and give a response, which will consume certain computing and network resources. If an attacker uses a large number of controlled hosts to continuously send resolution requests for different domain names, the cache of the DNS server will be continuously refreshed, and the failure of a large number of resolution requests to hit the cache will cause the DNS server to consume additional resources for iterative queries, which will greatly increase the resource consumption of the DNS server.在以半吊子的心情进入的地方等待着他的是残酷的训练。黑豹（邓光荣）是一名用高额金钱便可请得到而从未失手的职业侠盗。某夜，黑豹受政府内政部要员秋Sir（黄锦燊）重金邀请，偷取一个“银盒”，以试新装之保安系统。黑豹于是找来一班各有特殊技能的人来帮手，分别是嘉嘉（吴家丽）、孟波辉（梁家辉）、程仁（任达华）、Robert（张卫健）及黑豹的师妹青青（林青霞）。So how to calculate the attack mechanism of specific romance?钜子，现在我们的处境很不好啊……彭越不由的一声叹息。