CompTIA Server+ (SK0-005)Server Hardware Installation and ManagementMedium
A small office is experiencing frequent power fluctuations and occasional short outages that last for a few minutes. They have a critical file server that needs to remain operational during these events to prevent data corruption. Which type of power protection device would BEST address these requirements?
- AStandby UPS
- BOnline UPS
- CSurge Protector
- DPower Distribution Unit (PDU)
Show answer & explanationAnswer & explanation
Correct answer: B. Online UPS
An Online UPS provides continuous power to connected devices by converting incoming AC to DC to charge its battery, and then back to AC for output. This means devices are always running off the UPS's inverter, providing seamless power during fluctuations and outages without any transfer time, which is critical for sensitive equipment like servers.
Why the other options are wrong
- A. A Standby UPS switches to battery power only when an outage is detected, involving a brief transfer time that might disrupt sensitive servers.
- C. A surge protector only protects against voltage spikes, not outages or fluctuations.
- D. A PDU only distributes power, offering no protection against power issues.
Online UPS
An Uninterruptible Power Supply that continuously powers devices from its inverter, providing seamless, conditioned power and zero transfer time during outages or fluctuations.
- Zero transfer time
- Provides continuous power conditioning
- More expensive than standby UPS units
Memory trick: Online is always on, Standby waits for the light, Line-interactive smooths the ride, Offline is just a fright.