100-150 Question 117
Select 3A company is experiencing intermittent disruptions in their Wi-Fi network in a busy office environment. The IT team suspects that interference from other devices is causing the issue. Which of the following could be potential sources of interference for their 2.4GHz Wi-Fi network?
- A
Microwave ovens
- B
Cordless phones using DECT technology
- C
Bluetooth devices
- D
LTE cellular network signals
- E
Neighboring Wi-Fi networks on the same frequency band
Show answer and explanation
Correct answers: A, C, E
Explanation
The 2.4GHz band is widely used by various devices, including Bluetooth devices, microwaves, and other Wi-Fi networks. These devices can overlap with the 2.4GHz frequency and cause interference. However, technologies such as DECT cordless phones and LTE cellular networks typically operate outside the 2.4GHz band and are unlikely to contribute to interference in this scenario.
- A. Correct.
Microwave ovens can emit electromagnetic interference in the 2.4GHz band, which often disrupts Wi-Fi signals operating in the same frequency range.
- B. Incorrect.
Cordless phones using DECT technology typically operate in the 1.9GHz band, not in the 2.4GHz range, so they are unlikely to interfere with the 2.4GHz Wi-Fi network.
- C. Correct.
Bluetooth devices use the 2.4GHz frequency band and can cause interference with Wi-Fi networks operating in the same range, especially if there are many active Bluetooth devices nearby.
- D. Incorrect.
LTE cellular networks operate in licensed frequencies, such as 700MHz, 800MHz, or higher, which do not overlap with the unlicensed 2.4GHz Wi-Fi band, making them an unlikely source of interference.
- E. Correct.
Neighboring Wi-Fi networks operating on the same 2.4GHz band can cause co-channel and adjacent-channel interference, leading to disruptions in performance.