FC0-U71 Infrastructure Practice Question
A user wants to connect a high-resolution 4K monitor to their desktop computer for gaming at 144Hz. Which port should they use to ensure the best performance?
⚠ Common exam trap
The trap is assuming any modern digital port can handle 4K@144Hz — candidates often pick HDMI because it is common, but HDMI 1.4 specifically caps at 4K@30Hz, and only HDMI 2.1 supports 4K@144Hz.
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
✓
DisplayPort
DisplayPort is the correct choice because it supports 4K resolution at 144Hz (and higher) with sufficient bandwidth, and it is the standard interface for high-refresh-rate gaming monitors. DisplayPort 1.4 and later natively handle 4K@144Hz without compression, making it the best performance option among the listed ports.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DisplayPort
Why this is correct
DisplayPort carries enough bandwidth for 4K at 144Hz, whereas HDMI versions below 2.1 cap refresh rates at that resolution. Its packet-based link and higher lane throughput satisfy the stem's combined 4K and 144Hz performance constraint.
- ✗
DVI
Why it's wrong here
DVI lacks the bandwidth for 4K at 144Hz; single-link DVI cannot even reach 4K, and dual-link tops out well below that refresh. It is tempting as a familiar digital connector, and would suit 1080p or 1440p at moderate refresh rates.
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VGA
Why it's wrong here
VGA is analogue and cannot carry a 4K 144Hz signal at all; its bandwidth caps far below that. It is tempting because VGA remains common on legacy projectors and older monitors, where it is the correct choice for basic display output.
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HDMI 1.4
Why it's wrong here
HDMI 1.4 caps at 4K 30Hz, so it cannot deliver 144Hz at that resolution. It is tempting because HDMI is the standard consumer display connector, and it would be correct for 4K 60Hz or 1080p high-refresh setups within its bandwidth.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.