Cisco Network Academy Chapter 4 Question 1: What is the result of impedance mismatch? A. reflected energy B. power sags C. brown outs D. power surges Question 2: What is attenuation? A. travel B. delay C. a signal losing strength to its surroundings D. a signal gaining strength from its surroundings Question 3: Which is an external source of electrical impulses that can attack the quality of ele..