nerdexam
Cisco

350-401 · Question #1073

An engineer measures the Wi-Fi coverage at a customer site The RSSI values are recorded as follows: - Location A: -72 dBm - Location B: -75 dBm - Location C -65 dBm - Location D -80 dBm Which two stat

The correct answer is C. The RF signal strength at location B is 50% weaker than location A D. The RF signal strength at location C is 10 times stronger than location B. The engineer explains Wi-Fi signal strength by stating that -75 dBm is approximately 50% weaker than -72 dBm and -65 dBm is 10 times stronger than -75 dBm.

Submitted by suresh_in· Mar 6, 2026Infrastructure

Question

An engineer measures the Wi-Fi coverage at a customer site The RSSI values are recorded as follows:

  • Location A: -72 dBm
  • Location B: -75 dBm
  • Location C -65 dBm
  • Location D -80 dBm

Which two statements does the engineer use to explain these values to the customer? (Choose two.)

Options

  • AThe signal strength at location C is too weak to support web surfing
  • BLocation D has the strongest RF signal strength
  • CThe RF signal strength at location B is 50% weaker than location A
  • DThe RF signal strength at location C is 10 times stronger than location B
  • EThe signal strength at location B is 10 dB better than location C

How the community answered

(25 responses)
  • A
    4% (1)
  • B
    4% (1)
  • C
    80% (20)
  • E
    12% (3)

Why each option

The engineer explains Wi-Fi signal strength by stating that -75 dBm is approximately 50% weaker than -72 dBm and -65 dBm is 10 times stronger than -75 dBm.

AThe signal strength at location C is too weak to support web surfing

-65 dBm is considered a good to excellent signal strength, suitable for all types of Wi-Fi activities, including web surfing, making the statement that it's too weak incorrect.

BLocation D has the strongest RF signal strength

A higher (less negative) dBm value signifies a stronger RF signal. Location C at -65 dBm has the strongest signal among the given options, while Location D at -80 dBm has the weakest.

CThe RF signal strength at location B is 50% weaker than location ACorrect

A 3 dBm decrease in RSSI approximately halves the signal power (making it 50% weaker). The difference between -72 dBm and -75 dBm is 3 dBm, meaning -75 dBm is about 50% weaker than -72 dBm.

DThe RF signal strength at location C is 10 times stronger than location BCorrect

A 10 dBm increase in RSSI indicates a 10-fold increase in signal power. The difference between -75 dBm and -65 dBm is 10 dBm, meaning the signal at -65 dBm is 10 times stronger than at -75 dBm.

EThe signal strength at location B is 10 dB better than location C

A signal of -75 dBm is 10 dB *lower* (weaker) than -65 dBm, not 10 dB better; better signals have less negative dBm values.

Concept tested: Interpreting Wi-Fi RSSI values

Source: https://www.cisco.com/c/en/us/products/wireless/design-guide-c07-740789.html

Topics

#RSSI#dBm logarithmic scale#RF signal strength#wireless coverage

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full 350-401 Practice