单项选择题
A. Vampire tap B. Smart jack C.Demarcation point D. Programmable logic controller
A demarcation point is usually installed and managed by...
单项选择题A demarcation point is usually installed and managed by which of the following providers?（）
A. Web host provider B. VoIP company C. Telephone company D. Hardware manufacturer
Prioritizing traffic between data and voice is defined ...
单项选择题Prioritizing traffic between data and voice is defined as which of the following?（）
A. Caching engines B. Proxy server C. QoS D. Load balancing
Which of the following LAN technology has a MAXIMUM ran...
单项选择题Which of the following LAN technology has a MAXIMUM range of 10,000 meters (6 miles)?（）
A.10GBase-ER B.10GBase-SW C.10GBase-LW D.10GBase-EW
