N10-009 · Question #194
A technician is troubleshooting wireless connectivity near a break room. Whenever a user turns on the microwave, connectivity to the user's laptop is lost. Which of the following frequency bands is…
The correct answer is A. 2.4GHz. Microwave ovens commonly operate in the 2.4 GHz frequency band, causing significant interference with Wi-Fi networks using the same band, leading to connectivity loss.
Question
A technician is troubleshooting wireless connectivity near a break room. Whenever a user turns on the microwave, connectivity to the user's laptop is lost. Which of the following frequency bands is the laptop most likely using?
Options
- A2.4GHz
- B5GHz
- C6GHz
- D900MHz
How the community answered
(30 responses)- A90% (27)
- B7% (2)
- C3% (1)
Why each option
Microwave ovens commonly operate in the 2.4 GHz frequency band, causing significant interference with Wi-Fi networks using the same band, leading to connectivity loss.
Microwave ovens operate in the Industrial, Scientific, and Medical (ISM) band, specifically around 2.45 GHz. This frequency range directly overlaps with the 2.4 GHz Wi-Fi band (channels 1-11), making devices operating on this band highly susceptible to interference from active microwave ovens, leading to lost connectivity.
The 5GHz band is a separate frequency range and is generally not affected by microwave oven interference.
The 6GHz band is even higher frequency and also not affected by microwave oven interference.
The 900MHz band is much lower and not used by standard Wi-Fi or affected by microwave ovens.
Concept tested: Wi-Fi frequency bands and interference sources
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-5/config-guide/b_cg85/radio_management_config.html
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