ITN 100 UPDATED TEST PAPER QUESTIONS AND
ANSWERS SET A+
✔✔In a multipoint circuit configuration, each computer can use the circuit at the same
time. - ✔✔False
✔✔Baud rate is the number of bits transmitted per second. - ✔✔False
✔✔Ethernet, a common LAN technology, uses Manchester encoding. - ✔✔True
✔✔Frequency division multiplexing divides the circuit into a set of different time slots. -
✔✔False
✔✔The predominant method of transferring information internally in a computer is via
parallel mode. - ✔✔True
✔✔Coding schemes are groups of bits that translate into the "alphabet" of any given
system. - ✔✔True
✔✔A codec converts an incoming digital signal to an analog signal for transmission over
an analog network. - ✔✔False
✔✔Multimode fiber is capable of longer transmission distances than single mode fiber. -
✔✔False
✔✔The medium is the physical matter or substance that carries the voice or data
transmission. - ✔✔True
✔✔Fiber optic cable carries signals in traditional electrical form - ✔✔False
,✔✔When all bits of a character are transferred one after another, the bits are
transferred in ___________ mode. - ✔✔serial
✔✔ASCII is the least popular code for data communications. - ✔✔False
✔✔If each sample uses 16 bits and the number of samples taken each second is 8000;
then the transmission speed on the circuit is? - ✔✔128 Kbps
✔✔Which of the following statements is correct? - ✔✔Serial transmission is slower than
parallel transmission.
✔✔With nonreturn to zero signaling, the voltage alternates between zero and a positive
or negative voltage. - ✔✔False
✔✔microwave transmission - ✔✔All of the above
✔✔A(n) __________ circuit is another name for a multipoint configuration. - ✔✔shared
✔✔Propagation delay is negligible with satellite transmission - ✔✔False
✔✔Which is not true about point-to-point circuits? - ✔✔point-to-point circuits reduce the
amount of cable required and use the circuit more efficiently than multipoint circuits.
✔✔In general, networks designed to transmit primarily computer data are likely to be
________. - ✔✔digital
✔✔The acronym, Modem, stands for _________________. - ✔✔modulator-
demodulator
✔✔___________ is not a type of digital signaling technique. - ✔✔Data rate signaling
✔✔Frequency modulation refers to the changing of the height of the sound wave. -
✔✔False
✔✔With which type of digital signaling does the signal always return to zero volts after
each bit? - ✔✔Return-to-zero signaling
✔✔Statistical time division multiplexing does not require the capacity of the circuit to be
equal to the sum of the combined circuits. - ✔✔True
✔✔The type of media usually installed on homes and businesses by the telephone
company is called ____________. - ✔✔twisted pair
,✔✔Digital transmission occurs when the signal sent over the transmission media
constantly varies among an infinite number of states. - ✔✔False
✔✔Which type of digital signaling would experience fewer errors because it has more
distinct signals? - ✔✔bipolar
✔✔WDM is a version of FDM used in fiber-optic cables. - ✔✔True
✔✔______________ refers to the time it takes for a signal to travel from sender to
recipient (highly exaggerated with satellite transmission). - ✔✔Propagation delay
✔✔Which of the following is the most secure wired media? - ✔✔Fiber-optic cable
✔✔In which type of modulation is a 1 distinguished from a 0 by shifting the direction in
which the wave begins? - ✔✔Phase modulation
✔✔____________ is a modulation technique that combines two different amplitude
combinations with eight different phase combinations modulation to send four bits per
symbol. - ✔✔Quadrature Amplitude Modulation
✔✔A physical circuit refers to the transmission characteristics of the connection. -
✔✔False
✔✔Multitasking means to break one high-speed physical communication circuit into
several lower-speed logical circuits so that different devices can simultaneously use it. -
✔✔False
✔✔Which of the following media can best withstand harsh environmental conditions? -
✔✔Fiber-optic cable
✔✔One form of interference with satellite transmission is called raindrop attenuation in
which the transmissions are absorbed by heavy rain. - ✔✔True
✔✔Having a conversation with someone using a cellular phone is an example of
_________ transmission. - ✔✔full-duplex
✔✔____________ is used by IM and other applications that provide voice services over
lower-speed digital circuits. - ✔✔adaptive differential pulse code modulation
, ✔✔_____________ refers to the difference between the original analog data and the
approximation of that data using the techniques for translating from analog data to
digital signals. - ✔✔quantizing error
✔✔The typical range of human hearing is: - ✔✔20 to 14,000 Hz
✔✔Which of the following statements is true? - ✔✔bandwidth is constant across any
wire, therefore distance is not relevant to its capacity
✔✔Digital transmission produces more errors than analog transmission. - ✔✔False
✔✔The cabling that runs from the telecommunications closet to each LAN is called
backbone cabling. - ✔✔False
✔✔Data compression can increase the throughput of a communication link. - ✔✔True
✔✔__________ is a line-of-sight type of wireless media. - ✔✔microwave
✔✔Transmission speeds: - ✔✔differ widely among media
✔✔In full-duplex transmission, two stations can send and receive simultaneously. -
✔✔True
✔✔___________ refers to the spreading of the signal that different parts of the signal
arrive at different times at the destination. - ✔✔dispersion
✔✔With odd parity (assume that the parity bit (in bold) has been placed at the end of
each of the following) and a 7-bit ASCII code, which of the following is incorrect? -
✔✔00011011
✔✔Which of the following is not a type of synchronous protocol? - ✔✔VT100
✔✔Which of the following is true about the data link protocol, Ethernet (IEEE 802.3)? -
✔✔newer version permits jumbo frames
✔✔______________ controls errors by detecting and correcting them at the receiving
end without retransmission of the original message. - ✔✔Hamming code
✔✔With roll-call polling, a server polls clients in a consecutive, pre-arranged priority list.
- ✔✔True
✔✔In general, controlled approaches: - ✔✔work better than contention approaches for
large networks that have high usage
ANSWERS SET A+
✔✔In a multipoint circuit configuration, each computer can use the circuit at the same
time. - ✔✔False
✔✔Baud rate is the number of bits transmitted per second. - ✔✔False
✔✔Ethernet, a common LAN technology, uses Manchester encoding. - ✔✔True
✔✔Frequency division multiplexing divides the circuit into a set of different time slots. -
✔✔False
✔✔The predominant method of transferring information internally in a computer is via
parallel mode. - ✔✔True
✔✔Coding schemes are groups of bits that translate into the "alphabet" of any given
system. - ✔✔True
✔✔A codec converts an incoming digital signal to an analog signal for transmission over
an analog network. - ✔✔False
✔✔Multimode fiber is capable of longer transmission distances than single mode fiber. -
✔✔False
✔✔The medium is the physical matter or substance that carries the voice or data
transmission. - ✔✔True
✔✔Fiber optic cable carries signals in traditional electrical form - ✔✔False
,✔✔When all bits of a character are transferred one after another, the bits are
transferred in ___________ mode. - ✔✔serial
✔✔ASCII is the least popular code for data communications. - ✔✔False
✔✔If each sample uses 16 bits and the number of samples taken each second is 8000;
then the transmission speed on the circuit is? - ✔✔128 Kbps
✔✔Which of the following statements is correct? - ✔✔Serial transmission is slower than
parallel transmission.
✔✔With nonreturn to zero signaling, the voltage alternates between zero and a positive
or negative voltage. - ✔✔False
✔✔microwave transmission - ✔✔All of the above
✔✔A(n) __________ circuit is another name for a multipoint configuration. - ✔✔shared
✔✔Propagation delay is negligible with satellite transmission - ✔✔False
✔✔Which is not true about point-to-point circuits? - ✔✔point-to-point circuits reduce the
amount of cable required and use the circuit more efficiently than multipoint circuits.
✔✔In general, networks designed to transmit primarily computer data are likely to be
________. - ✔✔digital
✔✔The acronym, Modem, stands for _________________. - ✔✔modulator-
demodulator
✔✔___________ is not a type of digital signaling technique. - ✔✔Data rate signaling
✔✔Frequency modulation refers to the changing of the height of the sound wave. -
✔✔False
✔✔With which type of digital signaling does the signal always return to zero volts after
each bit? - ✔✔Return-to-zero signaling
✔✔Statistical time division multiplexing does not require the capacity of the circuit to be
equal to the sum of the combined circuits. - ✔✔True
✔✔The type of media usually installed on homes and businesses by the telephone
company is called ____________. - ✔✔twisted pair
,✔✔Digital transmission occurs when the signal sent over the transmission media
constantly varies among an infinite number of states. - ✔✔False
✔✔Which type of digital signaling would experience fewer errors because it has more
distinct signals? - ✔✔bipolar
✔✔WDM is a version of FDM used in fiber-optic cables. - ✔✔True
✔✔______________ refers to the time it takes for a signal to travel from sender to
recipient (highly exaggerated with satellite transmission). - ✔✔Propagation delay
✔✔Which of the following is the most secure wired media? - ✔✔Fiber-optic cable
✔✔In which type of modulation is a 1 distinguished from a 0 by shifting the direction in
which the wave begins? - ✔✔Phase modulation
✔✔____________ is a modulation technique that combines two different amplitude
combinations with eight different phase combinations modulation to send four bits per
symbol. - ✔✔Quadrature Amplitude Modulation
✔✔A physical circuit refers to the transmission characteristics of the connection. -
✔✔False
✔✔Multitasking means to break one high-speed physical communication circuit into
several lower-speed logical circuits so that different devices can simultaneously use it. -
✔✔False
✔✔Which of the following media can best withstand harsh environmental conditions? -
✔✔Fiber-optic cable
✔✔One form of interference with satellite transmission is called raindrop attenuation in
which the transmissions are absorbed by heavy rain. - ✔✔True
✔✔Having a conversation with someone using a cellular phone is an example of
_________ transmission. - ✔✔full-duplex
✔✔____________ is used by IM and other applications that provide voice services over
lower-speed digital circuits. - ✔✔adaptive differential pulse code modulation
, ✔✔_____________ refers to the difference between the original analog data and the
approximation of that data using the techniques for translating from analog data to
digital signals. - ✔✔quantizing error
✔✔The typical range of human hearing is: - ✔✔20 to 14,000 Hz
✔✔Which of the following statements is true? - ✔✔bandwidth is constant across any
wire, therefore distance is not relevant to its capacity
✔✔Digital transmission produces more errors than analog transmission. - ✔✔False
✔✔The cabling that runs from the telecommunications closet to each LAN is called
backbone cabling. - ✔✔False
✔✔Data compression can increase the throughput of a communication link. - ✔✔True
✔✔__________ is a line-of-sight type of wireless media. - ✔✔microwave
✔✔Transmission speeds: - ✔✔differ widely among media
✔✔In full-duplex transmission, two stations can send and receive simultaneously. -
✔✔True
✔✔___________ refers to the spreading of the signal that different parts of the signal
arrive at different times at the destination. - ✔✔dispersion
✔✔With odd parity (assume that the parity bit (in bold) has been placed at the end of
each of the following) and a 7-bit ASCII code, which of the following is incorrect? -
✔✔00011011
✔✔Which of the following is not a type of synchronous protocol? - ✔✔VT100
✔✔Which of the following is true about the data link protocol, Ethernet (IEEE 802.3)? -
✔✔newer version permits jumbo frames
✔✔______________ controls errors by detecting and correcting them at the receiving
end without retransmission of the original message. - ✔✔Hamming code
✔✔With roll-call polling, a server polls clients in a consecutive, pre-arranged priority list.
- ✔✔True
✔✔In general, controlled approaches: - ✔✔work better than contention approaches for
large networks that have high usage
