200-901 Network Fundamentals Practice Question
A network administrator is deploying a wireless network that supports the latest security standards and high throughput. Which TWO of the following are true regarding Wi-Fi 6 (802.11ax) compared to Wi-Fi 5 (802.11ac)?
⚠ Common exam trap
Cisco often tests the misconception that Wi-Fi 6 only uses 20 MHz channels or only operates on 5 GHz, confusing it with older standards like 802.11b/g or 802.11a, while the key differentiator is OFDMA and mandatory WPA3 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
✓
Uses OFDMA for improved efficiency
Wi-Fi 6 (802.11ax) introduces Orthogonal Frequency Division Multiple Access (OFDMA), which subdivides a channel into smaller resource units (RUs) to serve multiple clients simultaneously, significantly improving efficiency in dense environments compared to Wi-Fi 5's OFDM that allocates the entire channel to a single user per transmission.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Uses OFDMA for improved efficiency
Why this is correct
OFDMA allows multiple users to share channels efficiently.
- ✗
Uses only 20 MHz channels
Why it's wrong here
Wi-Fi 6 supports channel widths up to 160 MHz.
- ✓
Supports WPA3 as the mandatory security standard
Why this is correct
Wi-Fi 6 certification requires WPA3 support.
- ✗
Maximum theoretical speed is lower than Wi-Fi 5
Why it's wrong here
Wi-Fi 6 has higher speeds than Wi-Fi 5.
- ✗
Operates only on the 5 GHz band
Why it's wrong here
Wi-Fi 6 operates on both 2.4 and 5 GHz.
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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.