CompTIA Network+ (N10-007) — Question 358

A network engineer for a manufacturing company is implementing a wireless network that provides reliable coverage throughout the facility. There are several large, electric, motorized machines installed on the shop floor for automating the manufacturing process. These machines are known to be significant sources of
RF interference. Which of the following frequencies should the wireless network use to MINIMIZE this interference?

Answer options

• A. 2.4 GHz
• B. 56MHz
• C. 5GHz
• D. 900MHz

Correct answer: C

Explanation

The 5GHz frequency is less susceptible to interference from the electric motorized machines because it has a shorter wavelength and can avoid the 2.4GHz band where many devices operate, thus minimizing interference. The other frequencies, such as 2.4GHz and 900MHz, are more prone to RF interference from such machinery, while 56MHz is not a typical wireless frequency for modern networks.