100-140 Question 88
Single answerYou are troubleshooting a power issue with a network switch that requires a 12V DC input. However, the power source available is 120V AC. Which type of converter would you use to resolve this issue?
- A
AC-to-DC converter
- B
DC-to-DC converter
- C
Power over Ethernet (PoE) injector
- D
Step-up transformer
Show answer and explanation
Correct answer: A
Explanation
The network switch requires 12V DC input, but the available power source is 120V AC. To address this, an AC-to-DC converter is required to transform the power from AC to the DC format needed by the switch. Other options, such as DC-to-DC converters, PoE injectors, or step-up transformers, do not meet the requirements of the scenario.
- A. Correct.
An AC-to-DC converter is used to convert alternating current (AC) from the source into direct current (DC) required by the network switch. This is the correct solution for the given scenario.
- B. Incorrect.
A DC-to-DC converter is used when both the input and output are DC, but the voltage levels need to be adjusted. This is not applicable in this scenario because the input power is AC.
- C. Incorrect.
A Power over Ethernet (PoE) injector is used to supply power and data over Ethernet cables to compatible devices. It is not relevant in this scenario as the switch requires a dedicated 12V DC input.
- D. Incorrect.
A step-up transformer is used to increase the voltage of an AC source. This is not relevant since the goal is to convert AC to DC, not to change AC voltage levels.