200-901 Network Fundamentals Practice Question
Which wireless standard operates in both 2.4 GHz and 5 GHz bands and is commonly known as Wi-Fi 6?
⚠ Common exam trap
A common mix-up: candidates confuse Wi-Fi generations: candidates often mix up 802.11ac (Wi-Fi 5) with 802.11ax (Wi-Fi 6) or forget that 802.11ac is 5 GHz only, leading them to pick 802.11ac for dual-band support.
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
✓
802.11ax
The IEEE 802.11ax standard, marketed as Wi-Fi 6, is designed to operate in both the 2.4 GHz and 5 GHz frequency bands. It introduces efficiency improvements like OFDMA and MU-MIMO to better handle dense environments. Unlike 802.11ac, which is limited to 5 GHz, 802.11ax supports dual-band operation, making it backward compatible with older devices on both bands.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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802.11n
Why it's wrong here
802.11n spans 2.4 GHz and 5 GHz, so it is tempting for a dual-band question, but it is branded Wi-Fi 4, not Wi-Fi 6. Wi-Fi 6 is 802.11ax, which adds OFDMA and 1024-QAM; 802.11n predates both.
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802.11ac
Why it's wrong here
802.11ac operates only in the 5 GHz band, so it fails the 2.4 GHz requirement, and it is branded Wi-Fi 5, not Wi-Fi 6. It is tempting because it is the immediately preceding generation, yet 802.11ax is the standard designated Wi-Fi 6.
- ✓
802.11ax
Why this is correct
802.11ax, marketed as Wi-Fi 6, operates in both the 2.4 GHz and 5 GHz bands, satisfying the dual-band requirement in the stem. Unlike 802.11ac, which is 5 GHz only, 802.11ax supports concurrent dual-band operation, delivering higher throughput and improved efficiency in dense environments.
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802.11g
Why it's wrong here
802.11g operates only in the 2.4 GHz band, so it cannot satisfy the dual-band requirement, and it is branded Wi-Fi 3 rather than Wi-Fi 6. It is tempting because it was a widely deployed legacy standard, but 802.11ax is the actual Wi-Fi 6 designation.
About these practice questions
Courseiva writes every 200-901 question from scratch — 975 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 and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.