单项选择题
Which of the following services can an administrator use to reduce latency and prioritize the flowof data?（）
A. Fault tolerance B. RADIUS C. Qos D. Load balancing
单项选择题 Which of the following technologies was designed to provide the FASTEST data rates over analog phone lines?（）
单项选择题 Which of the following protocols defaults to port 161?（）
单项选择题 Which of the following monitors a server to see which protocols might be in use?（）
