Chapter 6 Data Communication
data communication - ANS-the electronic transfer of data from one location to another
bandwidth - ANS-the amount of data that can be transferred from one point to another in a
certain time period, usually one second
attenuation - ANS-the loss of power in a signal as it travels from the sending device to the
receiving device
broadband data transmission - ANS-multiple pieces of data are sent simultaneously to increase
the transmission rate
narrowband - ANS-a voice-grade transmission channel capable of transmitting a maximum of
56,000 bps, so only a limited amount of information can be transferred in a specific period of
time
protocols - ANS-rules that govern data communication, including error detection message
length, and transmission speed
modem - ANS-(short for modulator-demodulator) a device that connects a user to the Internet
digital subscriber line (DSL) - ANS-a common carrier service, is a high-speed service that uses
ordinary phone lines
communication media - ANS-or channels, connect sender and receiver devices. they can be
conducted or radiated
conducted media - ANS-provide a physical path along which signals are transmitted, including
twisted pair copper cable, coaxial cable, and fiber optics
radiated media - ANS-us an antenna for transmitting data through air or water
centralized processing system - ANS-all processing is done at one central computer
decentralized processing - ANS-each user, department, or division has its own
computer(sometimes called an "organizational unit") for performing processing tasks
distributed processing - ANS-maintains centralized control and decentralized operations.
processing power is distributed among several locations
data communication - ANS-the electronic transfer of data from one location to another
bandwidth - ANS-the amount of data that can be transferred from one point to another in a
certain time period, usually one second
attenuation - ANS-the loss of power in a signal as it travels from the sending device to the
receiving device
broadband data transmission - ANS-multiple pieces of data are sent simultaneously to increase
the transmission rate
narrowband - ANS-a voice-grade transmission channel capable of transmitting a maximum of
56,000 bps, so only a limited amount of information can be transferred in a specific period of
time
protocols - ANS-rules that govern data communication, including error detection message
length, and transmission speed
modem - ANS-(short for modulator-demodulator) a device that connects a user to the Internet
digital subscriber line (DSL) - ANS-a common carrier service, is a high-speed service that uses
ordinary phone lines
communication media - ANS-or channels, connect sender and receiver devices. they can be
conducted or radiated
conducted media - ANS-provide a physical path along which signals are transmitted, including
twisted pair copper cable, coaxial cable, and fiber optics
radiated media - ANS-us an antenna for transmitting data through air or water
centralized processing system - ANS-all processing is done at one central computer
decentralized processing - ANS-each user, department, or division has its own
computer(sometimes called an "organizational unit") for performing processing tasks
distributed processing - ANS-maintains centralized control and decentralized operations.
processing power is distributed among several locations
