شبكات الحاسب2

is continuous, like the movement of clock hands or a human voice.

• Analog data

• Digital data

has discrete states, like the sudden change in a digital clock or the binary representation of data in computer memory.

• Analog data

• Digital data

can be converted to digital signals or digital data can be modulated into analog signals for transmission.

• Analog data

• Digital data

have continuous values, meaning they can take on an infinite number of levels within a given time period.

• Analog signals

• Digital signals

have a limited number of defined values, often as simple as 1 and 0.

• Analog signals

• Digital signals

are represented by smooth curves

• Analog signals

• Digital signals

represented by vertical lines

• Analog signals

• Digital signals

repeat a pattern over regular time intervals called periods.

• Periodic signals

• Nonperiodic signals

change without repeating a pattern over time.

• Periodic signals

• Nonperiodic signals

refers to the range of frequencies present within a composite signal.

• Bandwidth

• Frequency

• period