Chapter 5: Data Communication
Data - ANS--Entities that convey meaning or information
-0s and 1s
Signal - ANS-Turn data into 0s and 1s
SIgnal - ANS-electromagnetic representation of data
Signaling - ANS-sending a signal over a communication meduim
Transmission - ANS-the whole process of turning data into a signal and sending it over a
communication medium
-"communication of data across a computer network by the propagation and processing of
signals "
Reliability and Efficiency of Transmission - ANS-is determined by the way in which
electromagnetic signals are enoded to convey data
Analog data - ANS--continuous values on some interval
-voice and video
-data collected by sensors such as tempr and pressure
Digital data - ANS--discrete values
-text, integers, binary data
Signals - ANS-are used to encode and transmit data
Analog Signal (definition) - ANS-continuously varying electromagnetic wave that may be
transmitted over both guided and unguided media
Digital Signal (definition) - ANS-the sequence of voltage pulses
digital signal (noise) - ANS-less susceptible to noise interference
digital signal (cost) - ANS-generally cheaper than analog signaling
digital signal (attenuation) - ANS-suffer more from attenuation than analog signals
digital signal (limitations) - ANS-can not be used on optical fiber or wireless media
Data - ANS--Entities that convey meaning or information
-0s and 1s
Signal - ANS-Turn data into 0s and 1s
SIgnal - ANS-electromagnetic representation of data
Signaling - ANS-sending a signal over a communication meduim
Transmission - ANS-the whole process of turning data into a signal and sending it over a
communication medium
-"communication of data across a computer network by the propagation and processing of
signals "
Reliability and Efficiency of Transmission - ANS-is determined by the way in which
electromagnetic signals are enoded to convey data
Analog data - ANS--continuous values on some interval
-voice and video
-data collected by sensors such as tempr and pressure
Digital data - ANS--discrete values
-text, integers, binary data
Signals - ANS-are used to encode and transmit data
Analog Signal (definition) - ANS-continuously varying electromagnetic wave that may be
transmitted over both guided and unguided media
Digital Signal (definition) - ANS-the sequence of voltage pulses
digital signal (noise) - ANS-less susceptible to noise interference
digital signal (cost) - ANS-generally cheaper than analog signaling
digital signal (attenuation) - ANS-suffer more from attenuation than analog signals
digital signal (limitations) - ANS-can not be used on optical fiber or wireless media
