Which Technology Suffers Microwave Oven Interference?
Short answer
B 802.11g operates in the 2.4 GHz band that microwave ovens leak into, so it suffers wireless interference from microwaves.
Question
Key Takeaways
The question tests which listed radio technology shares the 2.4 GHz spectrum with microwave ovens, and the trap is picking any wireless standard without recalling its operating frequency.
Microwave ovens radiate noise in the 2.4 GHz band, which is exactly where legacy Wi-Fi standards operate. This page establishes that 802.11g, running on 2.4 GHz, is the option vulnerable to microwave interference, while 6 GHz, infrared, and NFC are not.
Common mistake: Choosing A (6GHz) because it is also Wi-Fi; 6 GHz is a separate band introduced with Wi-Fi 6E/7 and is not affected by the 2.45 GHz output of microwave ovens, while infrared and NFC use entirely different parts of the spectrum.
Expert Analysis
Why the Answer Is Correct
802.11g operates exclusively in the 2.4 GHz ISM band, and household microwave ovens are designed to generate roughly 2.45 GHz to heat food. Because the oven's magnetron shielding is never perfect, it leaks energy into that same band, raising the noise floor and causing packet loss, retries, and throughput drops on 2.4 GHz Wi-Fi links located nearby. This is a classic real-world troubleshooting symptom: connectivity degrades each time the microwave runs. As acf9805 commented, "802.11g uses 2.4 GHz, and microwaves can interfere with 2.4 GHz Wi-Fi."
Why the Other Options Are Wrong
6 GHz is a newer, wider band used by Wi-Fi 6E and Wi-Fi 7 devices; it sits far above the 2.45 GHz emission of a microwave oven, so no coupling occurs. Infrared uses light wavelengths (roughly 850–950 nm) and requires line of sight, so it shares no spectrum with microwave radiation at all. NFC communicates at 13.56 MHz over centimeters of range, seven orders of magnitude away from 2.4 GHz, making microwave interference physically impossible. None of these three can be degraded by a running microwave.
Community Comment Notes
The single community comment selected option B and correctly tied 802.11g's 2.4 GHz operation to microwave leakage, noting that microwaves "can interfere with 2.4 GHz Wi-Fi." No dissenting comments were posted, and the vote record offers no competing choice to evaluate, so the comment aligns with the underlying RF physics rather than being an unsupported popularity pick.
Exam Strategy
Anchor each wireless option to its frequency band before answering: 2.4 GHz links (802.11b/g/n) collide with microwave ovens and Bluetooth, 5/6 GHz links do not, and NFC/IR live in entirely different spectra. On exam day, quickly eliminate any option whose operating band cannot physically overlap 2.45 GHz.
Frequently Asked Questions
Why doesn't 6 GHz Wi-Fi get interference from a microwave oven?
Why are NFC and infrared excluded as answers?
Discussion 1 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 1
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acf9805 👍 1 Answered B481. B — 802.11g 🧸 802.11g uses 2.4 GHz, and microwaves can interfere with 2.4 GHz Wi-Fi. 🍿📶
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