Analog and Digital Signaling Flashcards
when network engineers talk about the strength of a signal, they often refer to a _____
signal’s voltage
The strength of an electric signal is directly proportional to its ____
voltage
Voltage varies continuously and appears as a wavy line when graphed over time. What kind of signal is this?
Analog signal
A wave’s _______ is its strength at any given moment
amplitude
In what range do frequencies used to convey speech over telephone wires fail?
300-3300 Hz range
A waves wavelength is inversely proportional to its ______
frequency
______ refers to the progress of a wave over time in relationship to a fixed point
Phase
What are the components of digital signals? (3)
- pulses of precise
- positive voltages
- zero voltages
Pulses of precise, positive voltages and zero voltages compose what kind of signals?
Digital signals
What describes the nondata information that must accompany data for a signal to be properly routed and interpreted by the network
Overhead
