CompTIA Updated 220-1201 Exam Questions and Answers by lily-may

CompTIA A+ strongly emphasizes that virtual machines (VMs) are ideal for testing potentially unsafe software, malware samples, or experimental code because they isolate the environment from the host system. VMs allow snapshots, cloning, and rollback functionality, which makes them essential in development, QA, and cybersecurity environments where code might be unstable or harmful.

Hybrid cloud refers to infrastructure strategy, not code execution isolation. Load balancers distribute production traffic but have no testing or sandboxing purpose. Application gateways filter traffic but do not provide execution environments.

Virtual machines create a safe sandbox where failure, infection, or corruption is contained. This is covered in the Virtualization and Cloud Computing domain of the CompTIA A+ exam, making VMs the correct tool for executing unauthorized code safely.

A Power over Ethernet injector is the simplest solution because the unmanaged switch does not provide PoE. The injector is installed inline between the switch and the wireless access point. It adds electrical power to the Ethernet connection while allowing network data to travel over the same cable. This eliminates the need to install a separate electrical outlet in the attic, reducing installation complexity and cost. A patch panel organizes and terminates network cabling but does not provide power. Mounting an antenna on the roof would not solve the access point’s power requirement and could create additional environmental and cabling concerns. Installing an electrical outlet would work, but it requires electrical work and is less convenient. A PoE injector is specifically designed to power devices such as access points and IP cameras when the existing switch lacks PoE capability.

Comprehensive and Detailed Explanation

The wireless environment is crowded, and the office is using:

WEP encryption → obsolete, insecure, and supported only by outdated hardware

Default channel → likely causes interference in a busy area

CompTIA A+ emphasizes:

WEP should be replaced with WPA2 or WPA3

Older APs that only support WEP cannot simply be updated

Newer APs also allow dual-band / multiple channels to avoid interference

Therefore, the best solution is:

✔ Replace the access point with a modern WPA2/WPA3-capable AP that supports improved channel selection.

Why the other options are incorrect

B. Disabling SSID broadcast – Does nothing for performance or security.

C. MAC filtering – Ineffective for performance and easily bypassed.

D. Updating firmware – Cannot upgrade WEP hardware to WPA2/3 if hardware limitations exist.

Final Answer: A

2.4GHz Wi-Fi signals have better penetration through walls and other obstacles compared to 5GHz and 6GHz. Lower frequency waves (like 2.4GHz) travel farther and are less absorbed by physical barriers.

From the CompTIA A+ 220-1101 Official Study Guide, Objective 2.5 – Compare and contrast wireless networking protocols:

“The 2.4GHz frequency band offers greater range and better penetration through walls and obstacles than higher frequencies like 5GHz and 6GHz. Higher frequencies provide faster speeds but are more easily absorbed by walls.”

NFC (Near Field Communication) is not a Wi-Fi technology and works only over very short distances (a few centimeters).

Verified Source:

CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: Wireless Networking

CompTIA Exam Objectives 220-1101, Domain 2.5

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