200-901 Network Fundamentals Practice Question
A network engineer is configuring a wireless network for a hospital that requires high throughput and minimal interference from neighboring networks. Which set of 2.4 GHz channels should be used for non-overlapping coverage?
⚠ Common exam trap
Cisco often tests the misconception that any set of channels spaced 5 apart (e.g., 1, 6, 11) is the only valid set, but candidates may mistakenly think channels like 2, 7, 12 or 1, 5, 9 are also non-overlapping due to misunderstanding of channel width and regulatory restrictions.
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
✓
1, 6, 11
In the 2.4 GHz ISM band, channels 1, 6, and 11 are the only three non-overlapping channels, each separated by 25 MHz, which prevents co-channel interference. This configuration maximizes throughput and minimizes interference from neighboring networks, making it ideal for high-density environments like hospitals.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
1, 6, 11
Why this is correct
These are the standard non-overlapping channels.
- ✗
2, 7, 12
Why it's wrong here
Channel 12 is not available in all regulatory domains, and 2 and 7 overlap.
- ✗
1, 5, 9
Why it's wrong here
These channels overlap.
- ✗
1, 3, 5
Why it's wrong here
Channels 1, 3, and 5 overlap.
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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.