Signals and communication
A continuous signal that varies smoothly over time
analog signal
A component that allows current to flow in only one direction.
diode
A complete path through which electric current flows.
circuit
A unique number assigned to a device on a network.
IP address
The number of times a wave repeats per second, measured in hertz (Hz).
frequency
a signal that has only two states, usually represented as 0 and 1
digital signal
A component that limits electrical current in a circuit.
resistor
The flow of electric charge, measured in amperes (A).
current
A device that directs data between networks.
router
When a wave bounces off a surface instead of passing through.
reflection
A high-speed internet connection that can carry multiple signals at once.
broadband
a device that stores and releases electrical energy.
capacitor
A device that provides electrical energy to a circuit.
power supply
A network that connects computers within a small area, like an office
LAN
A high-frequency radio wave used in satellite and mobile communication.
microwave
The range of frequencies a signal occupies, measured in hertz (Hz).
bandwidth
A coil of wire that stores energy in a magnetic field.
inductor
A device that increases the strength of a signal.
amplifier
A set of rules for communication between devices.
protocol
The distance between two peaks of a wave.
wavelength
Unwanted electrical signals that interfere with communication.
noise
A device that converts one form of energy into another (e.g., sound to electricity).
transducer
A circuit that converts AC (alternating current) to DC (direct current).
rectifier
A technology that uses light to transmit data at high speeds.
fiber optics
A wave that can travel through space and carries energy.
electromagnetic wave