300-430 Question 119
Select 4You are conducting a wireless site survey for a new enterprise network deployment and notice significant interference in the 2.4 GHz band. After further investigation, you identify the presence of several devices operating in the vicinity. Which of the following devices could be likely sources of interference in the 2.4 GHz spectrum?
- A
Microwave ovens
- B
Bluetooth devices
- C
Cordless phones operating at 5.8 GHz
- D
Wireless video cameras using analog transmission
- E
Zigbee-based IoT devices
Show answer and explanation
Correct answers: A, B, D, E
Explanation
The 2.4 GHz ISM band is prone to interference from various devices that utilize the same spectrum, such as microwave ovens, Bluetooth devices, Zigbee IoT devices, and older analog wireless cameras. Identifying and mitigating these interferers is crucial for maintaining optimal wireless network performance. Devices like cordless phones operating at 5.8 GHz do not contribute to interference in the 2.4 GHz band as they operate on a different frequency range.
- A. Correct.
Microwave ovens emit radiation that overlaps with the 2.4 GHz spectrum and can cause significant interference, especially when in use.
- B. Correct.
Bluetooth devices operate in the 2.4 GHz ISM band and can contribute to interference in this frequency range.
- C. Incorrect.
Cordless phones operating at 5.8 GHz are not a source of interference in the 2.4 GHz band, as they use a different frequency range.
- D. Correct.
Wireless video cameras using analog transmission often operate in the 2.4 GHz band and are a known source of interference, especially in older systems.
- E. Correct.
Zigbee-based IoT devices primarily operate in the 2.4 GHz spectrum and can contribute to interference in this band.