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/questionThe 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.4 When the vehicle speed is 100km, the minimum transverse spacing is 1.5 m; The safe distance is 100 meters; The distance between dangerous vehicles is 50 meters.Yu Chen: It's incredible.Finally, let's do some testing work:足可见范亚父此时的心情，蹒跚的脚步有些凌乱，甚至是左右摇晃。One particle advantage of living in the country is that it allows sourcing straight from the ground. What homegrown or bough at the market, dye materials such as onion skin, green persistmon, yam, etc. Are generated more accessible. Here's a result of blending those specific redivisions with blue dye: