PK0-005 Practice Question: Basics of IT Infrastructure and IT Project Management
A data center upgrade project requires redundancy for critical systems. Which three components should be redundant? (Choose three.)
⚠ Common exam trap
Test-takers frequently confuse component-level redundancy (like RAID for disks) with infrastructure-level redundancy (power, UPS, network), leading them to select RAID controller or server chassis instead of the correct triad of power, UPS, and network switch.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Power supply
Power supply redundancy ensures that if one unit fails, the other can sustain the load without downtime. In a data center upgrade, redundant power supplies (often N+1 or 2N configuration) are critical to maintain uptime for servers and network gear. This directly supports high availability for the project's critical systems.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
RAID controller
Why it's wrong here
RAID controllers provide disk redundancy but are not typically duplicated as components.
- ✗
Server chassis
Why it's wrong here
Server chassis are not redundant; servers themselves may be clustered.
- ✓
Power supply
Why this is correct
Redundant power supplies ensure continued operation if one fails.
- ✓
UPS
Why this is correct
Redundant UPS units ensure backup power if one unit fails.
- ✓
Network switch
Why this is correct
Redundant switches prevent network outages from a single switch failure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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