Which measurement expresses the power of the signal at the receiver end?

• A. Bandwidth
• B. Latency
• C. RSSI
• D. Throughput

Answer: (C)

The main idea is how we quantify how strong the incoming signal is at the receiver. RSSI, or Received Signal Strength Indicator, is the measurement that expresses the power of the received radio signal. It is typically shown as a power level in dBm—higher values mean a stronger signal and better link quality, while lower values indicate a weaker signal and more potential for errors. This metric specifically talks about signal strength at the receiver, not about how much data can be sent (bandwidth), how long it takes for data to get from sender to receiver (latency), or how much data actually gets through (throughput). Some devices report RSSI in different scales, but the core idea is the same: it reflects the received signal power.