N10-009 Network Implementation Practice Question
A network engineer needs to deploy a new wireless network in a large office with many cubicles. The goal is to provide high throughput and support multiple simultaneous users. Which IEEE standard should be implemented?
⚠ Common exam trap
A common mix-up: candidates choose 802.11n because it supports MIMO and dual-band operation, overlooking that 802.11ac's MU-MIMO and wider channels provide significantly better performance for multiple simultaneous users in a dense environment.
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
✓
802.11ac
802.11ac (Wi-Fi 5) operates exclusively in the 5 GHz band, uses wider 80 MHz or 160 MHz channels, and supports MU-MIMO (Multi-User Multiple Input Multiple Output) to deliver high throughput and efficient handling of multiple simultaneous users in a dense office environment. This makes it the best choice among the options for a modern, high-capacity wireless deployment.
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 this is correct
802.11ac is the optimal choice for a large office due to its operation exclusively in the less congested 5 GHz band, offering significantly higher throughput, often reaching gigabit speeds. Its key feature, Multi-User Multiple-Input Multiple-Output (MU-MIMO), allows an access point to communicate with multiple client devices simultaneously, drastically improving efficiency and overall network capacity in high-density user environments. This standard is specifically designed to handle the demands of numerous users and bandwidth-intensive applications concurrently.
- ✗
802.11n
Why it's wrong here
While 802.11n represented a significant leap forward by introducing MIMO technology and dual-band operation (2.4 GHz and 5 GHz), offering speeds up to 600 Mbps, it is still inadequate for a large, high-density office compared to newer standards. It primarily uses Single-User MIMO (SU-MIMO), meaning the access point can only communicate with one client at a time, which creates bottlenecks and reduces efficiency when many devices are competing for bandwidth. This limitation makes it less suitable for environments with numerous concurrent users and high throughput demands.
When this WOULD be correct
A question asking for a cost-effective upgrade from 802.11a/g for a small office with fewer than 10 users and no need for high-definition streaming or large file transfers would make 802.11n the correct answer.
- ✗
802.11b
Why it's wrong here
802.11b is an obsolete wireless standard, operating solely in the highly congested 2.4 GHz band and offering a maximum theoretical data rate of only 11 Mbps. This extremely low throughput is entirely insufficient for the demands of a modern office environment, especially one with many users requiring reliable and fast network access. Its susceptibility to interference further degrades performance, making it an impractical choice for any contemporary deployment.
- ✗
802.11g
Why it's wrong here
802.11g operates exclusively within the crowded 2.4 GHz frequency band, sharing spectrum with various other devices like Bluetooth and microwaves, which leads to substantial interference and reduced effective throughput. With a maximum theoretical data rate of 54 Mbps, this standard is grossly insufficient to support the aggregate bandwidth requirements of a large office with many users and modern applications. Its limited speed and susceptibility to interference make it an entirely unsuitable option for a high-performance wireless network deployment.
When this WOULD be correct
An exam scenario where a small office or home network needs to upgrade from 802.11b to a faster but still 2.4 GHz-only standard, with legacy device compatibility and low cost as priorities.
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.
✓802.11acCorrect answer▾
Why this is correct
802.11ac is the optimal choice for a large office due to its operation exclusively in the less congested 5 GHz band, offering significantly higher throughput, often reaching gigabit speeds. Its key feature, Multi-User Multiple-Input Multiple-Output (MU-MIMO), allows an access point to communicate with multiple client devices simultaneously, drastically improving efficiency and overall network capacity in high-density user environments. This standard is specifically designed to handle the demands of numerous users and bandwidth-intensive applications concurrently.
✗802.11nWrong answer — click to see why▾
Why this is wrong here
802.11n is an older standard with lower maximum throughput (up to 600 Mbps) compared to 802.11ac (up to 6.9 Gbps) and does not support the higher density and performance requirements of a large office with many simultaneous users.
★ When this WOULD be the correct answer
A question asking for a cost-effective upgrade from 802.11a/g for a small office with fewer than 10 users and no need for high-definition streaming or large file transfers would make 802.11n the correct answer.
Why candidates choose this
Candidates may recall that 802.11n was a significant improvement over earlier standards and mistakenly believe it is still sufficient for modern high-density environments, or they may confuse it with 802.11ac due to similar naming.
✗802.11gWrong answer — click to see why▾
Why this is wrong here
802.11g supports a maximum data rate of 54 Mbps and operates only in the 2.4 GHz band, which cannot provide the high throughput required for multiple simultaneous users in a large office.
★ When this WOULD be the correct answer
An exam scenario where a small office or home network needs to upgrade from 802.11b to a faster but still 2.4 GHz-only standard, with legacy device compatibility and low cost as priorities.
Why candidates choose this
Candidates may confuse 802.11g with 802.11n or ac, thinking 'g' is newer than it is, or assume all 802.11 standards offer similar performance.
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?”
Go deeper
Related to this question
Learn chapter
Wireless Standards and Configuration
Key term
Multiple Input Multiple Output
Multiple Input Multiple Output (MIMO) is a wireless technology that uses multiple antennas at both the sender and receiver to increase data throughput and connection reliability without needing more bandwidth or power.
Key term
Wi-Fi
Wi-Fi is a technology that lets devices like laptops and phones connect to the internet or communicate with each other wirelessly using radio waves.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.