FC0-U71 Infrastructure Practice Question
A user is experiencing slow Wi-Fi performance at home. The router supports both 2.4GHz and 5GHz bands. Which frequency band would provide faster speeds but shorter range?
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
✓
5GHz
The 5GHz band offers higher speeds but has shorter range and is less prone to interference compared to 2.4GHz.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NFC
Why it's wrong here
NFC is a short-range contactless radio standard for taps and pairing, operating over centimetres, so it carries no Wi-Fi data traffic at all. It is tempting because it is a wireless technology commonly listed alongside Wi-Fi, and it would be the correct choice for contactless payment or pairing a headset.
- ✗
2.4GHz
Why it's wrong here
2.4GHz travels further but its narrower channels and heavier interference from neighbouring networks and appliances cap throughput, so it cannot deliver the faster speeds requested. It is tempting because it is the band most devices default to, and it is the right choice when range or wall penetration matters more than bandwidth.
- ✗
Bluetooth
Why it's wrong here
Bluetooth is a low-bandwidth personal-area protocol for peripherals such as keyboards and headsets, not a Wi-Fi frequency band, so it cannot provide faster throughput. It is tempting because it shares the 2.4GHz spectrum and is often confused with Wi-Fi, and it would be correct for connecting a wireless mouse.
- ✓
5GHz
Why this is correct
5GHz offers wider channels and higher throughput than 2.4GHz, satisfying the stem's demand for faster speeds. Its shorter wavelength attenuates more rapidly through walls and obstacles, giving the reduced range the question specifies. Microsoft Entra ID is irrelevant here; the deciding axis is frequency-dependent propagation and channel width.
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 →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.