单项选择题
A.The remote agent was not running.
B.The management card has failed.
C.The proxy server was blocking access.
D.The hardware firewall was blocking access.
单项选择题 Which of the following is the MOST important factor when considering environmental factors?（）
单项选择题 WhichofthefollowingofferstheMOSTredundancyforasystembutisalsoverycostly？（）
单项选择题 A technician wants to compare a new server performance over a period of time. Which of the following should the technician do FIRST?（）