CompTIA A+ Core 1 (220-1201) — Question 9

Which of the following has the best penetration through physical objects, such as walls?

Answer options

• A. 2.4GHz
• B. 5GHz
• C. 6GHz
• D. NFC

Correct answer: A

Explanation

The 2.4GHz band has longer wavelengths, which allows it to penetrate walls and other physical objects more effectively than higher frequencies like 5GHz and 6GHz. NFC operates at a much shorter range and is not designed for penetrating barriers, making it less effective in this context.