- A
802.11ac (Wi-Fi 5)
Why wrong: 802.11ac operates only in the 5 GHz band and uses MU-MIMO only for downlink. It does not have OFDMA, making it less effective in high-density interference environments.
- B
802.11ax (Wi-Fi 6)
802.11ax uses OFDMA and improved MU-MIMO, allowing better handling of many devices and interference. It also supports both 2.4 GHz and 5 GHz bands, providing better coverage in challenging environments.
- C
802.11n (Wi-Fi 4)
Why wrong: 802.11n is older and uses only MIMO without OFDMA. While it works in 2.4 and 5 GHz, it lacks the efficiency needed for dense IoT deployments in heavy interference.
- D
802.11g (Wi-Fi 3)
Why wrong: 802.11g operates only in the 2.4 GHz band and has limited throughput (up to 54 Mbps). It is outdated and poorly suited for high-density or interference-heavy environments.
N10-009 Network Implementation Practice Question
This N10-009 practice question tests your understanding of network implementation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer is designing a wireless network for a large warehouse with many metal racks and heavy machinery that cause significant RF interference. The network must support a high density of IoT sensors and provide reliable connectivity. Which IEEE wireless standard should the engineer implement to best meet these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 (Wi-Fi 6)
802.11ax (Wi-Fi 6) is the correct choice because it introduces Orthogonal Frequency Division Multiple Access (OFDMA), which subdivides channels into smaller resource units (RUs) to serve multiple IoT sensors simultaneously, improving efficiency in dense, interference-heavy environments. Additionally, Wi-Fi 6 includes BSS Coloring, which reduces co-channel interference by allowing devices to ignore transmissions from overlapping basic service sets, and Target Wake Time (TWT), which schedules IoT sensor transmissions to conserve battery and reduce contention.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
802.11ac (Wi-Fi 5)
Why it's wrong here
802.11ac operates only in the 5 GHz band and uses MU-MIMO only for downlink. It does not have OFDMA, making it less effective in high-density interference environments.
- ✓
802.11ax (Wi-Fi 6)
Why this is correct
802.11ax uses OFDMA and improved MU-MIMO, allowing better handling of many devices and interference. It also supports both 2.4 GHz and 5 GHz bands, providing better coverage in challenging environments.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
802.11n (Wi-Fi 4)
Why it's wrong here
802.11n is older and uses only MIMO without OFDMA. While it works in 2.4 and 5 GHz, it lacks the efficiency needed for dense IoT deployments in heavy interference.
- ✗
802.11g (Wi-Fi 3)
Why it's wrong here
802.11g operates only in the 2.4 GHz band and has limited throughput (up to 54 Mbps). It is outdated and poorly suited for high-density or interference-heavy environments.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose 802.11ac (Wi-Fi 5) because it is widely known for high throughput, but they overlook that 802.11ax's OFDMA and TWT are specifically designed for high-density IoT and interference-heavy environments, not just raw speed.
Detailed technical explanation
How to think about this question
Under the hood, 802.11ax's OFDMA divides a 20 MHz channel into 256 subcarriers (vs. 64 in 802.11ac), allowing simultaneous transmissions to multiple low-data-rate IoT sensors without collision. BSS Coloring assigns a color value to each BSS, enabling devices to defer only when the color matches, reducing unnecessary backoff in dense warehouse environments. In real-world scenarios, a warehouse with hundreds of temperature or vibration sensors can use TWT to wake only during scheduled slots, drastically reducing airtime contention and power consumption.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the N10-009 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this N10-009 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 802.11ax (Wi-Fi 6) — 802.11ax (Wi-Fi 6) is the correct choice because it introduces Orthogonal Frequency Division Multiple Access (OFDMA), which subdivides channels into smaller resource units (RUs) to serve multiple IoT sensors simultaneously, improving efficiency in dense, interference-heavy environments. Additionally, Wi-Fi 6 includes BSS Coloring, which reduces co-channel interference by allowing devices to ignore transmissions from overlapping basic service sets, and Target Wake Time (TWT), which schedules IoT sensor transmissions to conserve battery and reduce contention.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
This N10-009 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 N10-009 exam.
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