Business Data Communications and Networking Fitzgerald and Dennis Ch. 3
Question and Answers
physical circuit - Correct Answer:the actual wire used to connect two devices
logical circuit - Correct Answer:used to connect two devices, which refers to the transmission
characteristics of the connection
digital data - Correct Answer:computers produce digital data that are binary, either on or off, 0 or
1
analog data - Correct Answer:electrical signals shaped like the sound waves they transfer
circuit configuration - Correct Answer:basic physical layout of the circuit; can be point-to-point
or multi-point
point-to-point configuration - Correct Answer:goes from one point to another(e.g. from one
computer to another), called dedicated circuits- dedicated to use of two computers
multipoint configuration(shared circuit) - Correct Answer:many computers connected on the
same circuit; each must share circuit.
Disadvantage: only one computer can use the circuit at a time.
Advantage: reduce amt of cable, use available comms circuit more efficiently
Data flow: simplex - Correct Answer:A one-way mode of communication. Radio
and television broadcasts are simplex mode transmissions.
Data flow: half-duplex - Correct Answer:two-way transmission but can only transmit in one
direction at a time(e.g. walkie-talkie link) computers use control signals to decide which will
send and which will receive data
turnaround time - Correct Answer:amt of time half-duplex comm takes to switch between
receiving and sending
data flow: full duplex - Correct Answer:transmit in both directions simultaneously, no
turnaround time
medium(plural media) - Correct Answer:the physical matter or substance that carries the voice or
data transmission. can be wire, fiber-optic cable, or air
guided media - Correct Answer:those in which the message flows through a physical media,
media guides signal
can be: twisted-pair wire, coaxial cable, or fiber-optic cable.
wireless media - Correct Answer:Media in which the message is broadcast through the air, such
as microwave or satellite
Question and Answers
physical circuit - Correct Answer:the actual wire used to connect two devices
logical circuit - Correct Answer:used to connect two devices, which refers to the transmission
characteristics of the connection
digital data - Correct Answer:computers produce digital data that are binary, either on or off, 0 or
1
analog data - Correct Answer:electrical signals shaped like the sound waves they transfer
circuit configuration - Correct Answer:basic physical layout of the circuit; can be point-to-point
or multi-point
point-to-point configuration - Correct Answer:goes from one point to another(e.g. from one
computer to another), called dedicated circuits- dedicated to use of two computers
multipoint configuration(shared circuit) - Correct Answer:many computers connected on the
same circuit; each must share circuit.
Disadvantage: only one computer can use the circuit at a time.
Advantage: reduce amt of cable, use available comms circuit more efficiently
Data flow: simplex - Correct Answer:A one-way mode of communication. Radio
and television broadcasts are simplex mode transmissions.
Data flow: half-duplex - Correct Answer:two-way transmission but can only transmit in one
direction at a time(e.g. walkie-talkie link) computers use control signals to decide which will
send and which will receive data
turnaround time - Correct Answer:amt of time half-duplex comm takes to switch between
receiving and sending
data flow: full duplex - Correct Answer:transmit in both directions simultaneously, no
turnaround time
medium(plural media) - Correct Answer:the physical matter or substance that carries the voice or
data transmission. can be wire, fiber-optic cable, or air
guided media - Correct Answer:those in which the message flows through a physical media,
media guides signal
can be: twisted-pair wire, coaxial cable, or fiber-optic cable.
wireless media - Correct Answer:Media in which the message is broadcast through the air, such
as microwave or satellite
