Tool for testing of DNS stability and performance

DNS stability and performance testing tool(DNS cache testing). Application requirements Applications must: • Be fully automated or driven by a script. • Requires no installation. Ideally, it would simply be a directory of files requiring no setup or a single executable with resources built into it. Doesn't write data into Windows registry (Instead, configuration settings can be stored in the utility .config file, if required) • The script must use low CPU system resources.