The answer is 802.11ax (Wi-Fi 6), the best Wi-Fi standard for high density office environments. This standard is correct because it introduces Orthogonal Frequency Division Multiple Access (OFDMA), which divides channels into smaller sub-channels to serve multiple low-bandwidth clients simultaneously, and enhanced MU-MIMO that supports both uplink and downlink multi-user transmissions, drastically improving spectral efficiency and handling of many simultaneous connections. On the CompTIA Network+ N10-009 exam, this question tests your understanding of wireless standards in high-density scenarios, often appearing as a scenario where you must choose between 802.11ac (which lacks OFDMA) and 802.11ax. A common trap is selecting 802.11ac for its high peak speeds, but remember that raw speed is less critical than capacity in dense offices. For a quick memory tip: think "AX for Access eXtra capacity" — the 'X' in 802.11ax stands for the extra efficiency features like OFDMA that make it the top choice for crowded networks.
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 needs to implement a wireless network in a large open-plan office with high client density. The network must provide the fastest possible speeds and efficient handling of many simultaneous connections. Which IEEE 802.11 standard should be used?
Why wrong: 802.11ac (Wi-Fi 5) provides good speeds but operates only in the 5 GHz band and does not have the same efficiency features for high-density environments as 802.11ax.
B
802.11n
Why wrong: 802.11n (Wi-Fi 4) is older, offers lower speeds, and is less efficient in high-density scenarios compared to 802.11ax.
C
802.11ax
802.11ax (Wi-Fi 6) is the latest standard optimized for high-density environments with features like OFDMA, MU-MIMO, and improved modulation, providing the fastest speeds and best efficiency.
D
802.11r
Why wrong: 802.11r is a standard for fast roaming, not for high throughput or high-density performance. It is used to reduce authentication delay when moving between access points.
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 (Wi-Fi 6) is the correct choice because it introduces Orthogonal Frequency Division Multiple Access (OFDMA) and MU-MIMO (both uplink and downlink), which significantly improve spectral efficiency and capacity in high-density environments. It also supports 1024-QAM modulation for higher data rates, making it ideal for an open-plan office with many simultaneous connections.
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
Why it's wrong here
802.11ac (Wi-Fi 5) provides good speeds but operates only in the 5 GHz band and does not have the same efficiency features for high-density environments as 802.11ax.
✗
802.11n
Why it's wrong here
802.11n (Wi-Fi 4) is older, offers lower speeds, and is less efficient in high-density scenarios compared to 802.11ax.
✓
802.11ax
Why this is correct
802.11ax (Wi-Fi 6) is the latest standard optimized for high-density environments with features like OFDMA, MU-MIMO, and improved modulation, providing the fastest speeds and best efficiency.
Related concept
Read the scenario before looking for a memorised answer.
✗
802.11r
Why it's wrong here
802.11r is a standard for fast roaming, not for high throughput or high-density performance. It is used to reduce authentication delay when moving between access points.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 802.11ac (Wi-Fi 5) as the fastest standard because of its high single-user throughput, but they overlook that 802.11ax (Wi-Fi 6) is specifically designed for high-density, multi-user scenarios with OFDMA and improved MU-MIMO.
Trap categories for this question
Scenario analysis trap
802.11n (Wi-Fi 4) is older, offers lower speeds, and is less efficient in high-density scenarios compared to 802.11ax.
Detailed technical explanation
How to think about this question
802.11ax improves upon previous standards by using OFDMA to subdivide a channel into smaller resource units (RUs), allowing multiple clients to transmit simultaneously on the same channel without collision, which is critical in dense environments. Additionally, it introduces BSS Coloring to reduce co-channel interference by allowing devices to ignore transmissions from neighboring Basic Service Sets, further boosting efficiency in open-plan offices.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this N10-009 question in full detail.
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 — 802.11ax (Wi-Fi 6) is the correct choice because it introduces Orthogonal Frequency Division Multiple Access (OFDMA) and MU-MIMO (both uplink and downlink), which significantly improve spectral efficiency and capacity in high-density environments. It also supports 1024-QAM modulation for higher data rates, making it ideal for an open-plan office with many simultaneous connections.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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