What type of electrical interference can be caused by computer network equipment?
A loud AC hum in the audio output of your station’s receiver
A clicking noise at intervals of a few seconds
The appearance of unstable modulated or unmodulated signals at specific frequencies✓الإجابة الصحيحة
A whining-type noise that continually pulses off and on
الشرح
Network hardware carries data at high clock rates, so its radiation appears at the receiver as discrete signals on specific frequencies related to those clocks, varying in strength and character as traffic changes. Hum, regular clicking and pulsing whines point to other sources such as power wiring or motors.