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220-1201 Practice Question: A technician is deploying a wireless network in a…
A technician is deploying a wireless network in a large warehouse. The warehouse has metal shelving and concrete walls. The technician needs to ensure coverage throughout the area. Which antenna type should be used for the access points to maximize coverage in this 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
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Directional antenna
In an environment with obstacles like metal and concrete, omnidirectional antennas may not penetrate well. Directional antennas can focus the signal in a specific direction, helping to overcome obstacles and extend range. The correct answer is a directional antenna, such as a Yagi or panel antenna.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Omnidirectional antenna
Why it's wrong here
Omnidirectional antennas broadcast radio frequency (RF) signals equally in all horizontal directions, creating a spherical or donut-shaped coverage pattern. While suitable for open environments, this broad dispersion of power significantly reduces signal strength in any single direction, making them highly ineffective for penetrating dense obstacles such as multiple walls, metal structures, or concrete floors, leading to poor connectivity and potential dead zones in challenging deployments.
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Directional antenna
Why this is correct
Directional antennas concentrate their RF energy into a focused beam, significantly increasing the effective radiated power (ERP) in a specific direction. This focused transmission allows the signal to penetrate dense building materials like concrete and metal more effectively, overcome interference, and achieve longer ranges in targeted areas. This makes them ideal for point-to-point links or covering specific challenging zones within a complex environment.
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Dipole antenna
Why it's wrong here
A dipole antenna is a fundamental type of omnidirectional antenna, commonly seen as the external antennas on many consumer-grade wireless routers. It radiates a signal in a donut-shaped pattern, providing 360-degree coverage horizontally but with limited vertical reach. This broad, unfocused radiation pattern means it lacks the necessary gain and signal concentration to effectively penetrate significant physical obstacles or provide robust coverage in environments with dense construction materials.
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Rubber duck antenna
Why it's wrong here
A rubber duck antenna is a compact, flexible, and typically low-gain omnidirectional antenna, often found on smaller wireless devices or access points. Its design prioritizes convenience and broad, unfocused coverage over signal strength and penetration capabilities. Consequently, it is inherently unsuitable for environments requiring signals to pass through dense materials like metal and concrete, where a more powerful, focused beam is essential for reliable connectivity.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1201 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 220-1201 exam.