CompTIA Security+ Exam Prep

Answer: A - Digital transmission signals are binary digits as electrical pulses. Each individual pulse is a signal element and represents either a 1 or a 0. Digital signals are more reliable than analog signals over a long distance and provide a clear-cut and efficient signaling method. Digital signals can easily be extracted from noise and retransmitted. Digital signals are a square wave, which does not have all the possible values of the different amplitudes and frequencies of an analog signal. Digital systems are superior to analog systems because they can transport more calls and data transmission on the same line at higher quality over longer distances.