The correct answer is: D. an external modem.
A UPS (uninterruptible power supply) is a device that provides temporary power to a computer or other electronic equipment during a power outage. This allows the equipment to shut down properly, preventing data loss or damage to the hardware.
A standard UPS is designed to provide power to devices that draw a relatively small amount of current, such as computers, monitors, and printers. However, some devices, such as external modems, can draw a large amount of current. If an external modem is plugged into a standard UPS, it can overload the UPS and cause it to fail.
Therefore, it is important to check the power requirements of any device before plugging it into a UPS. If the device draws more current than the UPS can provide, it should not be plugged into the UPS.
Here is a brief explanation of each option:
- A. monitor: A monitor is a device that displays the output of a computer. It typically draws a small amount of current, so it can be plugged into a standard UPS.
- B. laser printer: A laser printer is a device that prints text and images on paper. It typically draws a moderate amount of current, so it may or may not be able to be plugged into a standard UPS. It is important to check the power requirements of the specific laser printer before plugging it into a UPS.
- C. ink-jet printer: An ink-jet printer is a device that prints text and images on paper. It typically draws a small amount of current, so it can be plugged into a standard UPS.
- D. an external modem: An external modem is a device that connects a computer to the internet. It typically draws a large amount of current, so it should not be plugged into a standard UPS.
- E. None of the above: None of the above options are correct. The correct answer is: D. an external modem.