Is -20 dBm or -80 a stronger signal?

-20 dBm is a stronger signal than -80 dBm. In the decibel (dBm) scale, lower negative values indicate a stronger signal. Therefore, -20 dBm represents a signal that is much closer to 0 dBm, which is the reference point for 1 milliwatt of power, while -80 dBm indicates a weaker signal.