FC0-U71 Infrastructure Practice Question
A user is trying to connect a laptop to a high-definition monitor that supports 4K resolution at 60Hz. Which of the following ports on the laptop will support this video output?
⚠ Common exam trap
The trap is that candidates may think any USB port can output video, but USB-A 3.0 does not natively carry a display signal — only HDMI, DisplayPort, or USB-C with Alt Mode do.
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
✓
HDMI
HDMI supports 4K resolution at 60Hz, making it the correct port for connecting a laptop to a 4K monitor. HDMI 2.0 and later versions specifically support 4K at 60Hz, which is the standard for modern laptops and monitors. The other ports listed are not video output interfaces and cannot carry a display signal to a monitor.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
HDMI
Why this is correct
HDMI carries digital video and supports 4K at 60Hz when using HDMI 2.0 or later, matching the monitor's stated resolution and refresh rate. Older standards such as VGA are analogue and cannot deliver this bandwidth.
- ✗
Ethernet RJ45
Why it's wrong here
RJ45 carries wired network traffic, not video signals, so it cannot drive a 4K 60Hz display. It is tempting because Ethernet is the standard laptop port for connectivity, and it would be the right answer for a question about linking to a LAN or router.
- ✗
3.5mm audio jack
Why it's wrong here
A 3.5mm jack transmits analogue audio only, with no video lanes, so it cannot feed a 4K 60Hz monitor. It is tempting because it is a common laptop port for external output, and it would be correct for connecting speakers or a headset.
- ✗
USB-A 3.0
Why it's wrong here
USB-A 3.0 carries data at 5Gbps and does not natively output DisplayPort video, so it cannot drive 4K at 60Hz. It is tempting because USB ports often connect peripherals and docks, and it would be correct for attaching a flash drive or keyboard.
About these practice questions
Courseiva writes every FC0-U71 question from scratch — 988 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on FC0-U71
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A user wants to connect an external monitor to their laptop. The monitor supports a resolution of 3840x2160 at 60Hz. Which of the following ports on the laptop would be BEST suited for this display?
medium- A.USB 3.0 Type-A
- ✓ B.DisplayPort
- C.VGA
- D.HDMI 1.4
Why B: DisplayPort is the best choice because it natively supports 4K resolution at 60Hz and higher, with ample bandwidth (DisplayPort 1.2 offers 17.28 Gbps) to drive such a display without compression or chroma subsampling. It is designed specifically for high-resolution digital display connections and is standard on modern laptops and monitors. HDMI 1.4, while capable of 4K, is limited to 30Hz at that resolution, making it unsuitable for smooth 60Hz operation.
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.