Exam 350-401 Topic 5 Question 88 Discussion

In the context of Wi-Fi signal strength, RSSI (Received Signal Strength Indicator) values are measured in dBm (decibels relative to a milliwatt) and represent the power level being received by the antenna. The closer this value is to 0, the stronger the signal. Thus, a signal of -65 dBm is stronger than a signal of -75 dBm.
* For option A, without knowing the specific RSSI requirements for web surfing, we cannot definitively say that location C's signal is too weak.
* Option B states that location D has the strongest RF signal strength; however, this is incorrect as location C has an RSSI of -65 dBm which indicates a stronger signal than location D's -80 dBm.
* Option C suggests that the RF signal strength at location B is 50% weaker than at location A. This statement does not accurately describe how RSSI values work; they are not linear percentages but rather logarithmic measurements.
* Option D correctly states that the signal strength at location B (-75 dBm) is 10 dB better (stronger) than at location C (-65 dBm), which follows from understanding how decibel scales operate.
* Lastly, option E incorrectly claims that the RF signal strength at location C is 10 times stronger than at Location B. The difference in decibels does not translate to a tenfold increase in power.