单项选择题 Which of the following utilities will produce the results printed below?（） Tracing route to 172.30.0.78 over a maximum of 30 hops . 1 <1 ms <1 ms172.30.0.78

单项选择题 For an enterprise to use one of the reserved private IP address ranges, as best practice they shouldcoordinate with:（）

单项选择题 A user reports that when the phone rings in their house the wireless on their laptops becomes disconnected. Which of the following BEST describes the issue?（）