N10-009 Network Implementation Practice Question

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, or Wi-Fi 5, while offering substantial speed improvements over previous generations, is not the optimal choice for a high-density, large open-plan office. It operates exclusively in the 5 GHz band and lacks the advanced efficiency mechanisms, such as OFDMA and uplink MU-MIMO, that are crucial for managing numerous concurrent connections effectively. Consequently, its performance would degrade more significantly under heavy client loads compared to 802.11ax.

  When this WOULD be correct

  When the question specifies a network upgrade from 802.11n requiring backward compatibility and higher throughput on 5 GHz, but does not require support for 2.4 GHz or the latest efficiency features like OFDMA.

• ✗

  802.11n

  Why it's wrong here

  802.11n, also known as Wi-Fi 4, is an outdated standard that would be insufficient for a modern large open-plan office requiring high performance. While it introduced MIMO and channel bonding, its maximum theoretical speeds are significantly lower than newer standards, and its efficiency in managing numerous concurrent connections is poor. Deploying 802.11n would quickly lead to network congestion and unsatisfactory user experience in a high-density environment.

  When this WOULD be correct

  A question asking for a standard that provides backward compatibility with older devices (802.11a/b/g) and supports basic MIMO for improved range in a small office or home network with low client density.

• ✓

  802.11ax

  Why this is correct

  802.11ax, also known as Wi-Fi 6, is the most suitable standard for a large open-plan office due to its optimization for high-density client environments. It significantly improves efficiency and throughput by utilizing Orthogonal Frequency-Division Multiple Access (OFDMA) for simultaneous communication with multiple clients and enhanced Multi-User Multiple-Input Multiple-Output (MU-MIMO) for both uplink and downlink. These features ensure better performance and capacity, even with numerous devices competing for bandwidth and diverse traffic types.

• ✗

  802.11r

  Why it's wrong here

  802.11r is an amendment designed to facilitate fast basic service set (BSS) transitions, commonly known as fast roaming, for wireless clients. Its primary function is to reduce the authentication delay when a client moves between access points within the same network, improving user experience for mobile devices. However, 802.11r does not inherently provide increased throughput, capacity, or efficiency for high-density environments, which is the core requirement for a large open-plan office.

  When this WOULD be correct

  In a scenario where the network must support seamless, low-latency handoffs for voice or video clients moving between access points, 802.11r (Fast BSS Transition) would be the correct choice.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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