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Exam CWDP-303 topic 1 question 15 discussion

Actual exam question from CWNP's CWDP-303

Question #: 15
Topic #: 1

[All CWDP-303 Questions]

A customer is acquiring a new VoWLAN system to replace their existing wired phone system. When reading about his system's requirements, you learned that is requires 25 db of SNR to work as expected. After surveying the environment, you discovered that the noise floor is -88 dBm. What should be the minimum RSSI value to meet the system's requirements?

A. -70 dBm
B. -67 dBm
C. -65 dBm
D. -63 dBm

Show Suggested Answer

Suggested Answer: B 🗳️

by Yazeed at May 19, 2020, 7:25 p.m.

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Yazeed

Highly Voted 3 years, 11 months ago

It's -63; SNR = S - N 25 = -63 - (-88)

upvoted 6 times

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ted62

Most Recent 2 years, 8 months ago

I agree with -67, although -63 is technically feasible, non design I know of will account for the noise floor to adjust the requirements. So, knowing that certification tests try to throw you into a false answer, I believe the correct answer to the certification question is -67.

upvoted 1 times

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Korndal

3 years, 3 months ago

No the answer is based on design which has 2 values recommended 25 and -67 https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/Enterprise-Mobility-8-1-Design-Guide/Enterprise_Mobility_8-1_Deployment_Guide/Chapter-9.html

upvoted 3 times

CLX81

3 years, 3 months ago

the noise floor is -88 so it will have to be -63

upvoted 2 times

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fikayo05

3 years, 7 months ago

correct -63 is the correct answer