NOT KNOWN DETAILS ABOUT CASE STUDY ANSWERS

Explanation: The -n possibility tells ping to only present numerical IP addresses during the output, skipping the resolution of hostnames.实现菊花链的局限性相对比较大，对显示的接口类型要求较高，不是所有的显示器都具备这样的连接条件。Rationalization: The -a alternative permits the terminal bell to chime