A company plans to use the National Day holiday when business is not busy to shut down the power supply of computer room I for circuit safety maintenance. After the circuit maintenance is completed, the powered-off equipment needs to be powered on. Which of the following equipment power-on sequence is correct?

A company plans to use the National Day holiday when business is not busy to shut down the power supply of computer room I for circuit safety maintenance. After the circuit maintenance is completed, the powered-off equipment needs to be powered on. Which of the following equipment power-on sequence is correct?
A . External power supply -> server power supply -> switch power supply -> controller box power supply
B . External power -> server power -> controller box power -> switch power
C . External power -> controller box power -> server power -> switch power
D . External power supply -> controller box power supply -> switch power supply -> server power supply

View Answer

Answer: D