200-901 Network Fundamentals Practice Question
Which wireless standard is commonly known as Wi-Fi 6 and operates in both 2.4 GHz and 5 GHz bands?
⚠ Common exam trap
Cisco often tests the misconception that 802.11ac (Wi-Fi 5) operates in both bands, but it is strictly 5 GHz only, while 802.11ax is the first to bring high-efficiency features to the 2.4 GHz band as well.
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
802.11ax, marketed as Wi-Fi 6, is the correct answer because it is the only standard among the options that operates in both the 2.4 GHz and 5 GHz bands and introduces OFDMA, 1024-QAM, and improved MU-MIMO for higher efficiency and throughput. Wi-Fi 6 is backward compatible with previous standards but requires compatible clients to leverage its full capabilities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
802.11g
Why it's wrong here
802.11g is older, 2.4 GHz only.
- ✗
802.11n
Why it's wrong here
802.11n is Wi-Fi 4, older standard.
- ✗
802.11ac
Why it's wrong here
802.11ac is Wi-Fi 5, operates only in 5 GHz.
- ✓
802.11ax
Why this is correct
802.11ax (Wi-Fi 6) supports both 2.4 GHz and 5 GHz.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 200-901 question from scratch — 989 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 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.