单项选择题
Which of the following wiring distribution components should be chosen to provide level integrateddiagnostic capabilities?（）
A. Vampire tap B. Smart jack C.Demarcation point D. Programmable logic controller
单项选择题 A demarcation point is usually installed and managed by which of the following providers?（）
单项选择题 Prioritizing traffic between data and voice is defined as which of the following?（）
单项选择题 Which of the following LAN technology has a MAXIMUM range of 10,000 meters (6 miles)?（）
