What is the wireless received signal strength indicator?

Question

Options

• AThe value given to the strength of the wireless signal received compared to the noise level
• BThe value of how strong the wireless signal Is leaving the antenna using transmit power, cable
• CThe value of how much wireless signal is lost over a defined amount of distance
• DThe value of how strong a tireless signal is receded, measured in dBm

• B
  3% (1)
• C
  3% (1)
• D
  94% (29)

Explanation

Wireless RSSI Explained

Option D is correct because RSSI (Received Signal Strength Indicator) is specifically a measurement of how strong a wireless signal is at the point of reception, expressed in dBm (decibel-milliwatts), typically ranging from 0 dBm (strongest) to -100 dBm (weakest).

Why the distractors are wrong:

• Option A describes SNR (Signal-to-Noise Ratio), which compares signal strength relative to noise - RSSI does not factor in noise
• Option B describes transmit power/EIRP, which measures signal leaving the antenna, not being received
• Option C describes path loss or free-space loss, which measures signal degradation over distance

Memory Tip: Break down the acronym - Received Signal Strength Indicator. The key word is "Received" - RSSI always refers to what arrives at your device, not what is sent. Think of it like checking how strongly your phone receives a WiFi signal, measured in dBm. If you remember "RSSI = what you receive, measured in dBm," you'll never confuse it with the other metrics.

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