单选题A server will not power on. Which of the following devices should the administrator use FIRST to determine the problem？（）ALoop back plugsBPower supply testerCSystem logsDTDR
题目
单选题
A server will not power on. Which of the following devices should the administrator use FIRST to determine the problem？（）
A
Loop back plugs
B
Power supply tester
C
System logs
D
TDR