Test Bank For Business Data
Communications and Networking, 15th
Edition by FitzGerald, Durcikova,
Complete Questions With Actual
Answers||100% Correct And Verified
(Chapters 1 – 12)
Media access controls - CORRECT ANSWERS-Refer to the need to control when
computers transmit.
Data link layer - CORRECT ANSWERS-Accepts messages from the network layer and
controls the hardware that transmits them.
Rules or protocols in data transmission - CORRECT ANSWERS-Both the sender and
receiver need to be concerned about the rules or protocols that govern how they
communicate.
Contention - CORRECT ANSWERS-A form of media access control where a computer
does not have to wait before it can transmit; it can transmit at any time.
Polling - CORRECT ANSWERS-The process of permitting clients to transmit or receive
at specific times, not at any time.
Roll-call polling - CORRECT ANSWERS-A server polls clients in a consecutive, pre-
arranged priority list.
Token passing - CORRECT ANSWERS-A term that refers to hub polling, where one
computer starts a poll and passes it to the next computer on a multipoint circuit.
Ethernet local area networks - CORRECT ANSWERS-Widely use contention for media
access control.
Controlled access MAC approaches - CORRECT ANSWERS-Work well in a large
network with high usage.
Commonly used controlled access techniques - CORRECT ANSWERS-Include access
requests, access demands, and polling.
,Categories of network errors - CORRECT ANSWERS-Include lost data and delimited
data.
Message corruption - CORRECT ANSWERS-Occurs if a computer transmits a
message containing 'ABC' and the destination computer receives 'abc'.
Data transmission errors - CORRECT ANSWERS-Typically are not distributed uniformly
in time.
Undesirable stray electrical voltage - CORRECT ANSWERS-Can cause data
communication errors.
Gaussian noise - CORRECT ANSWERS-Is a special type of attenuation.
Impulse noise - CORRECT ANSWERS-Is caused by the thermal agitation of electrons.
Crosstalk - CORRECT ANSWERS-Occurs when the signal transmitted on one circuit or
channel creates an undesired effect in another circuit or channel.
Attenuation - CORRECT ANSWERS-Refers to the loss of signal strength.
Intermodulation noise - CORRECT ANSWERS-Occurs when the signals from two
circuits combine to form a new signal that falls into a frequency band reserved for
another signal.
Physical and data link layers of wired Ethernet - CORRECT ANSWERS-Have been
refined over the years as a collection of standards under the IEEE 802.3 workgroup.
Distance between repeaters or amplifiers on a telephone circuit - CORRECT
ANSWERS-Is determined by the amount of power gained per unit length of the
transmission.
Amplifying the signal on an analog circuit - CORRECT ANSWERS-Also amplifies any
noise that is present on the circuit.
Error detection and correction - CORRECT ANSWERS-Requires extra error detection
'data' to be included with each message.
Odd parity-checking scheme - CORRECT ANSWERS-Sets the parity bit to make the
total number of ones in the byte an even number.
Parity checking - CORRECT ANSWERS-Can only detect an error when an even
number of bits are switched.
Cyclical redundancy check - CORRECT ANSWERS-Is one of the most popular
polynomial error-checking schemes.
,Simplest method for error correction - CORRECT ANSWERS-Is retransmission.
Continuous ARQ - CORRECT ANSWERS-Is another term for sliding window.
Forward error correction - CORRECT ANSWERS-One type is the Hamming code.
Forward error correction - CORRECT ANSWERS-Commonly used in satellite
transmission.
HDLC - CORRECT ANSWERS-Very similar to the SDLC synchronous data link
protocol.
Overhead bits - CORRECT ANSWERS-Used for error checking and marking the start
and end of characters and packets.
Transmission efficiency - CORRECT ANSWERS-Refers to the percentage of bits
transmitted without errors.
Data link layer - CORRECT ANSWERS-Accepts streams of bits from the application
layer.
Data link layer - CORRECT ANSWERS-Responsible for encoding the bit-stream as a
series of electronic voltages.
Data link layer - CORRECT ANSWERS-Performs error detection.
Data link layer - CORRECT ANSWERS-Performs routing functions.
Data link layer - CORRECT ANSWERS-Organizes data from the physical layer and
passes these coherent messages directly to the application layer.
Media access control - CORRECT ANSWERS-Not very important in point-to-point with
full duplex configuration.
Media access control - CORRECT ANSWERS-Not very important in local area
networks.
Media access control - CORRECT ANSWERS-Not very important in a point-to-point
with a half-duplex configuration.
Media access control - CORRECT ANSWERS-Not very important in a multipoint
configuration.
Media access control - CORRECT ANSWERS-Does not control when computers
transmit.
, Roll call polling - CORRECT ANSWERS-Cannot be modified to increase priority of
clients or terminals.
Roll call polling - CORRECT ANSWERS-Does not require a server, host, or special
device that performs the polling.
Roll call polling - CORRECT ANSWERS-Also called token passing.
Roll call polling - CORRECT ANSWERS-A type of contention approach to media access
control.
Controlled approaches - CORRECT ANSWERS-Work better than contention
approaches for large networks that have high usage.
Contention approaches - CORRECT ANSWERS-Generally do not work better than
controlled approaches for all sizes of networks.
Media access control - CORRECT ANSWERS-Refers to the methods used to control
access to the media in a network.
Error detection using parity - CORRECT ANSWERS-The probability for detecting an
error, given that one has occurred, is about 50% for either even or odd parity.
Error detection probability - CORRECT ANSWERS-Using parity, the probability for
detecting an error, given that one has occurred, is about 25% for either even or odd
parity.
Error detection probability (even/odd parity) - CORRECT ANSWERS-Using parity, the
probability for detecting an error, given that one has occurred, is about 70% for even
parity and 30% for odd parity.
Error detection probability (reverse parity) - CORRECT ANSWERS-Using parity, the
probability for detecting an error, given that one has occurred, is about 30% for even
parity and 70% for odd parity.
Error detection probability (low) - CORRECT ANSWERS-Using parity, the probability for
detecting an error, given that one has occurred, is about 20% for either even or odd
parity.
Error detection probability (high) - CORRECT ANSWERS-Using parity, the probability
for detecting an error, given that one has occurred, is about 100% for either even or odd
parity.
Synchronous transmission - CORRECT ANSWERS-Cannot be used on multipoint
circuits.
Communications and Networking, 15th
Edition by FitzGerald, Durcikova,
Complete Questions With Actual
Answers||100% Correct And Verified
(Chapters 1 – 12)
Media access controls - CORRECT ANSWERS-Refer to the need to control when
computers transmit.
Data link layer - CORRECT ANSWERS-Accepts messages from the network layer and
controls the hardware that transmits them.
Rules or protocols in data transmission - CORRECT ANSWERS-Both the sender and
receiver need to be concerned about the rules or protocols that govern how they
communicate.
Contention - CORRECT ANSWERS-A form of media access control where a computer
does not have to wait before it can transmit; it can transmit at any time.
Polling - CORRECT ANSWERS-The process of permitting clients to transmit or receive
at specific times, not at any time.
Roll-call polling - CORRECT ANSWERS-A server polls clients in a consecutive, pre-
arranged priority list.
Token passing - CORRECT ANSWERS-A term that refers to hub polling, where one
computer starts a poll and passes it to the next computer on a multipoint circuit.
Ethernet local area networks - CORRECT ANSWERS-Widely use contention for media
access control.
Controlled access MAC approaches - CORRECT ANSWERS-Work well in a large
network with high usage.
Commonly used controlled access techniques - CORRECT ANSWERS-Include access
requests, access demands, and polling.
,Categories of network errors - CORRECT ANSWERS-Include lost data and delimited
data.
Message corruption - CORRECT ANSWERS-Occurs if a computer transmits a
message containing 'ABC' and the destination computer receives 'abc'.
Data transmission errors - CORRECT ANSWERS-Typically are not distributed uniformly
in time.
Undesirable stray electrical voltage - CORRECT ANSWERS-Can cause data
communication errors.
Gaussian noise - CORRECT ANSWERS-Is a special type of attenuation.
Impulse noise - CORRECT ANSWERS-Is caused by the thermal agitation of electrons.
Crosstalk - CORRECT ANSWERS-Occurs when the signal transmitted on one circuit or
channel creates an undesired effect in another circuit or channel.
Attenuation - CORRECT ANSWERS-Refers to the loss of signal strength.
Intermodulation noise - CORRECT ANSWERS-Occurs when the signals from two
circuits combine to form a new signal that falls into a frequency band reserved for
another signal.
Physical and data link layers of wired Ethernet - CORRECT ANSWERS-Have been
refined over the years as a collection of standards under the IEEE 802.3 workgroup.
Distance between repeaters or amplifiers on a telephone circuit - CORRECT
ANSWERS-Is determined by the amount of power gained per unit length of the
transmission.
Amplifying the signal on an analog circuit - CORRECT ANSWERS-Also amplifies any
noise that is present on the circuit.
Error detection and correction - CORRECT ANSWERS-Requires extra error detection
'data' to be included with each message.
Odd parity-checking scheme - CORRECT ANSWERS-Sets the parity bit to make the
total number of ones in the byte an even number.
Parity checking - CORRECT ANSWERS-Can only detect an error when an even
number of bits are switched.
Cyclical redundancy check - CORRECT ANSWERS-Is one of the most popular
polynomial error-checking schemes.
,Simplest method for error correction - CORRECT ANSWERS-Is retransmission.
Continuous ARQ - CORRECT ANSWERS-Is another term for sliding window.
Forward error correction - CORRECT ANSWERS-One type is the Hamming code.
Forward error correction - CORRECT ANSWERS-Commonly used in satellite
transmission.
HDLC - CORRECT ANSWERS-Very similar to the SDLC synchronous data link
protocol.
Overhead bits - CORRECT ANSWERS-Used for error checking and marking the start
and end of characters and packets.
Transmission efficiency - CORRECT ANSWERS-Refers to the percentage of bits
transmitted without errors.
Data link layer - CORRECT ANSWERS-Accepts streams of bits from the application
layer.
Data link layer - CORRECT ANSWERS-Responsible for encoding the bit-stream as a
series of electronic voltages.
Data link layer - CORRECT ANSWERS-Performs error detection.
Data link layer - CORRECT ANSWERS-Performs routing functions.
Data link layer - CORRECT ANSWERS-Organizes data from the physical layer and
passes these coherent messages directly to the application layer.
Media access control - CORRECT ANSWERS-Not very important in point-to-point with
full duplex configuration.
Media access control - CORRECT ANSWERS-Not very important in local area
networks.
Media access control - CORRECT ANSWERS-Not very important in a point-to-point
with a half-duplex configuration.
Media access control - CORRECT ANSWERS-Not very important in a multipoint
configuration.
Media access control - CORRECT ANSWERS-Does not control when computers
transmit.
, Roll call polling - CORRECT ANSWERS-Cannot be modified to increase priority of
clients or terminals.
Roll call polling - CORRECT ANSWERS-Does not require a server, host, or special
device that performs the polling.
Roll call polling - CORRECT ANSWERS-Also called token passing.
Roll call polling - CORRECT ANSWERS-A type of contention approach to media access
control.
Controlled approaches - CORRECT ANSWERS-Work better than contention
approaches for large networks that have high usage.
Contention approaches - CORRECT ANSWERS-Generally do not work better than
controlled approaches for all sizes of networks.
Media access control - CORRECT ANSWERS-Refers to the methods used to control
access to the media in a network.
Error detection using parity - CORRECT ANSWERS-The probability for detecting an
error, given that one has occurred, is about 50% for either even or odd parity.
Error detection probability - CORRECT ANSWERS-Using parity, the probability for
detecting an error, given that one has occurred, is about 25% for either even or odd
parity.
Error detection probability (even/odd parity) - CORRECT ANSWERS-Using parity, the
probability for detecting an error, given that one has occurred, is about 70% for even
parity and 30% for odd parity.
Error detection probability (reverse parity) - CORRECT ANSWERS-Using parity, the
probability for detecting an error, given that one has occurred, is about 30% for even
parity and 70% for odd parity.
Error detection probability (low) - CORRECT ANSWERS-Using parity, the probability for
detecting an error, given that one has occurred, is about 20% for either even or odd
parity.
Error detection probability (high) - CORRECT ANSWERS-Using parity, the probability
for detecting an error, given that one has occurred, is about 100% for either even or odd
parity.
Synchronous transmission - CORRECT ANSWERS-Cannot be used on multipoint
circuits.
