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ITN 100 > Ch 3 Qz3 > Flashcards

Ch 3 Qz3 Flashcards

1
Q

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

Pulse code modulation

Adaptive differential pulse code modulation

Voice conversation

Code modulation

Phase modulation

A

Adaptive differential pulse code modulation

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2
Q

A _________ is an FDM device that splits the physical circuit into three logical circuits (phone, upstream data, downstream data).

DSL modem

cable modem

wireless router

V.44 modem

Serial modem

A

DSL modem

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3
Q

A(n) ___________ divides one high-speed communication circuit into several lower speed circuits for the primary reason of saving communication line costs.

transponder

multiplexer

inverse multiplexer

codec

intelligent terminal

A

multiplexer

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4
Q

Which of the following statements is true?

the longer the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire

the shorter the distance of a telephone wire between sender and recipient, the lower the bandwidth across that wire

bandwidth is constant across any wire, therefore distance is not relevant to its capacity

the longer the distance of a telephone wire between sender and recipient, the higher the bandwidth across that wire

bandwidth is not a term that can be used when discussing telephone transmissions

A

bandwidth is constant across any wire, therefore distance is not relevant to its capacity

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5
Q

The acronym, Modem, stands for _________________.

multiplexing/demultiplexing

more/demote

Mode-M technique

modulator/demodulator

Mod emulation technique

A

modulator/demodulator

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6
Q

Data compression can increase the throughput of a communication link.

True

False

A

True

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7
Q

Ethernet, a common LAN technology, uses Manchester encoding.

True

False

A

True

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8
Q

Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.

True

False

A

True

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9
Q

_________ is the basic physical layout of the circuit.

Point-to-point configuration

Configuration

Circuit configuration

Circuit design

Circuit plan

A

Circuit configuration

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10
Q

Multiplexing increases the cost of provisioning network circuits.

True

False

A

False

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11
Q

Which of the following is the most secure wired media?

coaxial cable

unshielded twisted pair

shielded twisted pair

fiber optic cable

infrared

A

fiber optic cable

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12
Q

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

64 Kbps

12800 bps

96 Kbps

32000 bps

A

128 Kbps

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13
Q

To get more “bandwidth” in a digital transmission, you must:
Group of answer choices

increase the range of frequencies available for a transmission

increase the loudness per transmission

decrease the bits per second transmission speed

increase the phase shifts per transmission

increase the baud rate per transmission

A

increase the range of frequencies available for a transmission

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14
Q

Coding schemes are groups of bits that translate into the “alphabet” of any given system.
Group of answer choices

True

False

A

True

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15
Q

Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.
Group of answer choices

voice converter

modem

codec

multiplexer

demodulator

A

Codec

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16
Q

ASCII is the least popular code for data communications.
Group of answer choices

True

False

A

False

17
Q

The cabling that runs from the telecommunications closet to each LAN is called backbone cabling.
Group of answer choices

True

False

A

False

18
Q

Digital transmission permits higher maximum transmission rates when compared to analog.
Group of answer choices

True

False

A

True

19
Q

Transmission speeds:
Group of answer choices

are the same among all media

are not a factor in selecting a media because all media have more than enough speed to serve current communication demands

are a constant, 56Kbps, for all media types

differ widely among media

always have a direct correlation with security

A

differ widely among media

20
Q

The room that contains the cable termination points and the distribution frames is referred to as
Group of answer choices

telecommunications closet

equipment room

building entrance

backbone room

work area

A

telecommunications closet

ITN 100 (5 decks)

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