Quick Answer
The answer is the 5 GHz band, which is typically less congested than the 2.4 GHz band because it offers 23 non-overlapping channels compared to just 3 on 2.4 GHz, and it is used by fewer devices, including legacy Wi-Fi clients and common household appliances like microwaves and cordless phones. This reduced co-channel interference makes 5 GHz the preferred choice for minimizing interference from neighboring networks in dense wireless environments. On the CompTIA ITF+ FC0-U61 exam, this concept tests your understanding of wireless standards and frequency management, often appearing in scenario-based questions where a technician must choose a band to avoid congestion. A common trap is assuming 2.4 GHz is better due to its longer range, but the exam emphasizes that more channels and less device overlap on 5 GHz directly reduce interference. For a quick memory tip, think “5 has more lanes” — 5 GHz has 23 non-overlapping channels versus 2.4 GHz’s 3, so traffic flows smoother with less jamming.
This FC0-U61 practice question tests your understanding of infrastructure. 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 technician is setting up a wireless network. To minimize interference from neighboring networks, which wireless frequency band is typically less congested?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
900 MHz
Why wrong: 900 MHz is not a standard Wi-Fi frequency band.
5 GHz
5 GHz provides more channels and less interference.
2.4 GHz
Why wrong: 2.4 GHz is widely used and often experiences interference.
60 GHz
Why wrong: 60 GHz is used for WiGig, not typical for general Wi-Fi.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
5 GHz
The 5 GHz band is typically less congested than the 2.4 GHz band because it has more non-overlapping channels (23 vs. 3) and is used by fewer devices, including legacy Wi-Fi clients. This reduces co-channel interference from neighboring networks, making 5 GHz the preferred choice for minimizing interference in dense wireless environments.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
900 MHz
Why it's wrong here
900 MHz is not a standard Wi-Fi frequency band.
5 GHz
Why this is correct
5 GHz provides more channels and less interference.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
2.4 GHz
Why it's wrong here
2.4 GHz is widely used and often experiences interference.
60 GHz
Why it's wrong here
60 GHz is used for WiGig, not typical for general Wi-Fi.
Common exam traps
The trap here is that candidates assume 2.4 GHz is less congested because it has longer range, but they overlook that its limited non-overlapping channels and ubiquitous use by non-Wi-Fi devices (microwaves, Bluetooth) make it far more congested than 5 GHz.
Detailed technical explanation
The 5 GHz band (802.11a/n/ac/ax) offers 23 non-overlapping 20 MHz channels in the U-NII-1, U-NII-2, U-NII-2e, and U-NII-3 sub-bands, with DFS (Dynamic Frequency Selection) required in some channels to avoid radar interference. In real-world scenarios, enterprise deployments often use 5 GHz exclusively for client traffic while reserving 2.4 GHz for legacy devices or management, leveraging band steering to push dual-band clients to the less congested 5 GHz band.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
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FAQ
Infrastructure — This question tests Infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: 5 GHz — The 5 GHz band is typically less congested than the 2.4 GHz band because it has more non-overlapping channels (23 vs. 3) and is used by fewer devices, including legacy Wi-Fi clients. This reduces co-channel interference from neighboring networks, making 5 GHz the preferred choice for minimizing interference in dense wireless environments.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 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 FC0-U61 exam.
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