Cisco 300-425 Exam - Topic 3 Question 118 Discussion

Actual exam question for Cisco's 300-425 exam

Question #: 118
Topic #: 3

As part of a wireless site survey in a hospital, an engineer needs to identify potential Layer 1 interferers. In which two areas is the engineer most likely to find sources of 2.4 GHz and 5 GHz RF noise? (Choose two.)

Amagnetic resonance imaging

Bkitchen

CGamma Knife radiation treatment

DX-ray radiography

Epatient room

Show Suggested Answer

Suggested Answer: B, D

In a hospital setting, the kitchen is a common source of 2.4 GHz RF noise due to the use of microwave ovens which operate on the same frequency. X-ray radiography equipment, while primarily using higher frequency ranges, can also contribute to RF noise in both the 2.4 GHz and 5 GHz bands due to electronic components and shielding inefficiencies.Reference: CCNP Enterprise Wireless Design ENWLSD 300-425 and Implementation ENWLSI 300-430 Official Cert Guide.

https://www.ciscopress.com/articles/article.asp?p=2351131&seqNum=2

by Tamra at Nov 22, 2025, 07:03 AM

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Wayne

3 days ago

A and B are spot on, but I’d also consider E for patient equipment.

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Maricela

8 days ago

C and D seem unlikely, I don’t think they operate on those frequencies.

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Kindra

27 days ago

Wait, are we sure about A? MRI machines are super sensitive, right?

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Leatha

1 month ago

I agree, the kitchen has a lot of appliances that could cause noise.

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Casandra

1 month ago

Definitely A and B, those are common sources of interference.

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Fabiola

1 month ago

B and E, for sure. I heard the patients like to have their own personal microwave ovens in their rooms.

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Estrella

2 months ago

B and D, no doubt. Gotta watch out for those pesky microwaves and X-rays in a hospital.

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Maryann

2 months ago

B and E. Kitchens have lots of electrical appliances, and patients might have wireless medical devices.

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Benton

2 months ago

I'd say B and C. Gamma Knife and kitchen equipment can both emit high-frequency noise.

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Abel

2 months ago

Definitely B and D. Microwaves and X-rays are known to cause RF interference.

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Candida

2 months ago

I’m torn between the kitchen and the MRI area; both seem plausible for 2.4 GHz and 5 GHz noise, but I can't recall specifics.

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Denna

2 months ago

I feel like I’ve seen practice questions that mentioned kitchens and imaging equipment as potential sources of interference.

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Kirk

3 months ago

I think I've got a good strategy here. I'll focus on areas with high-powered electrical equipment that operates in those frequency ranges, like the kitchen and radiation treatment facilities.

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Lyda

3 months ago

I'm a bit confused on this one. I know hospitals have a lot of different medical equipment, but I'm not sure which ones specifically would cause 2.4 GHz and 5 GHz interference.

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France

3 months ago

I’m not entirely sure, but I think MRI machines could also cause interference since they use strong magnetic fields.

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Elise

3 months ago

I think A and C are the best choices. MRI machines are known for interference.

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Yolando

3 months ago

I remember we discussed how kitchens can have a lot of RF noise from microwaves, so that might be a good choice.

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Tequila

4 months ago

I feel like E could have some noise too, but not as much as A or C.

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Man

4 months ago

This is a great question! I'm feeling confident I can nail this. The key is to identify the hospital departments that use a lot of wireless technology or have powerful electrical equipment.

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Gregoria

4 months ago

Okay, I've got a few ideas. I'm pretty sure the kitchen and any areas with medical imaging equipment like MRI and X-ray would be good places to check.

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Lashawn

4 months ago

Hmm, this seems like a tricky one. I'll need to think carefully about the potential sources of RF interference in a hospital setting.

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