_________ is one way that data rates over traditional telephone lines can be increased dramatically.

_________ is one way that data rates over traditional telephone lines can be increased dramatically. a. SONET b. T-carrier services c. CSU/DSU d....

Digital Subscriber Line:

Digital Subscriber Line: a. is a fairly recent approach to provide higher data transmission rates across traditional voice circuits in the local...

Inverse multiplexing means:

Inverse multiplexing means:  a. combining several low speed circuits to enable them to be transmitted across one high speed circuit b. multiplexing...

Statistical time division multiplexers differ from time division multiplexers because they:

Statistical time division multiplexers differ from time division multiplexers because they:  a. can cause time delays when all devices are being...

Which of the following types of multiplexing is least efficient for data transmission?

Which of the following types of multiplexing is least efficient for data transmission?  a. frequency division multiplexing b. statistical time...

_____ separate channels to reduce interference between channels in frequency division multiplexing.

_____ separate channels to reduce interference between channels in frequency division multiplexing. a. Channel blockers b. Statistical dividers c....

Frequency division multiplexing:

Frequency division multiplexing:  a. operates by statistically time slicing the signal b. operates by dividing the signal into different frequencies c....

The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels is

The type of multiplexer that divides the circuit horizontally into different light frequencies that are transmitted simultaneously across many channels...

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

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

A 56K modem that uses the V.90 standard:

A 56K modem that uses the V.90 standard: a. never has problems with noise on the telephone line b. can recognize an 8-bit digital symbol 8000 times...

When converting analog voice data to digital signals, Pulse Code Modulation samples the incoming voice signal _______ times per second.

When converting analog voice data to digital signals, Pulse Code Modulation samples the incoming voice signal _______ times per second. a. 8,000 b....

__________ 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.

__________ refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog...

Codec refers to:

Codec refers to: a. codependent decreasing compression b. co- Digital Equipment Corporation c. Codd's laws for data relations d. code/decode e. continuous...

When V.34 modems initially connect, they must go through a ____________ sequence to test the circuit and determine the optimum combination of symbol rate and modulation technique that will produce the highest throughput.

When V.34 modems initially connect, they must go through a ____________ sequence to test the circuit and determine the optimum combination of symbol...

_____ is a modem standard that uses Lempel-Ziv encoding to compress data.

_____ is a modem standard that uses Lempel-Ziv encoding to compress data.  a. V.22 b. V.44 c. V.32bis d. V.34 e. RS 232 Answer: V....

Which statement is false about modems?

Which statement is false about modems? a. modems are usually used in pairs (2 at a time) b. a receiving modem demodulates and a sending modem modulates c....

The acronym, Modem, stands for _________________.

The acronym, Modem, stands for _________________. a. multiplexing/demultiplexing b. more/demote c. Mode-M technique d. modulator/demodulator e. Mod...

Using TCM that sends 6 bits per each signal and a voice grade line with a bandwidth of 3000 Hz (assume: no noise on the line), the data capacity would be ___________ bits per second.

Using TCM that sends 6 bits per each signal and a voice grade line with a bandwidth of 3000 Hz (assume: no noise on the line), the data capacity would...

Which of the following statements is true?

Which of the following statements is true? a. the longer the distance of a telephone wire between sender and recipient, the lower the bandwidth across...

To get more "bandwidth" in a digital transmission, you must:

To get more "bandwidth" in a digital transmission, you must: a. increase the range of frequencies available for a transmission b. increase the loudness...

________ is the approximate bandwidth of traditional telephone circuits.

________ is the approximate bandwidth of traditional telephone circuits. a. 30,000 - 40,000 Hz b. 300 - 400 Hz c. 3 - 4 Hz d. 3000 - 4000 Hz e. 9000...

The typical range of human hearing is:

The typical range of human hearing is: a. 0 to 4,000 Hz b. 0 to 1,200 Hz c. 20 to 14,000 Hz d. 0 to 300 Hz e. 0 to 56,000 Hz Answer: 20 - 14,000...

The _____________ of a circuit determines a circuit's capacity.

The _____________ of a circuit determines a circuit's capacity. a. frequency b. bandwidth c. phase d. amplitude e. loudness Answer: bandwid...

______ is a unit of signaling speed that indicates how often the signal changes on a communication circuit.

______ is a unit of signaling speed that indicates how often the signal changes on a communication circuit.  a. bits per second rate b. phase...

TCM stands for:

TCM stands for: a. Tandem Control Microprocessor, a hardware feature of front end processors used to manage and control data communications b. Telephone...

__________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four bits per wave, or symbol.

__________ is a modulation technique that combines two different amplitude combinations with eight different phase combinations modulation to send four...

When sending four bits at a time using frequency modulation, the number of different frequency levels that would be needed would be _______.

When sending four bits at a time using frequency modulation, the number of different frequency levels that would be needed would be _______. a. 24 b....

In which type of modulation is a 1 distinguished from a 0 by shifting the direction in which the wave begins?

In which type of modulation is a 1 distinguished from a 0 by shifting the direction in which the wave begins? a. bandwidth modulation b. amplitude...

With respect to converting digital data into analog signals, AM stands for:

With respect to converting digital data into analog signals, AM stands for: a. Asynchronous Manchester b. Analog Multimode c. Amplitude Modulation d....

______ is not a form of modulation used to transform digital data into analog signals.

______ is not a form of modulation used to transform digital data into analog signals. a. synchronous time division b. amplitude shift keying c....

The height of a sound wave is called its:

The height of a sound wave is called its: a. frequency b. phase c. amplitude d. bandwidth e. furlong Answer: amplitu...

The direction in which the sound wave begins is known as:

The direction in which the sound wave begins is known as: a. amplitude, which our ears detect as loudness b. frequency, which our ears detect as...

Which of the following is a characteristic of sound waves that can be modulated to convert digital data into analog signals?

Which of the following is a characteristic of sound waves that can be modulated to convert digital data into analog signals? a. phase b. attenuation c....

Which type of digital signaling would experience fewer errors because it has more distinct signals?

Which type of digital signaling would experience fewer errors because it has more distinct signals? a. unipolar b. serial c. double current d. attenuation e....

With which type of digital signaling does the signal always return to zero volts after each bit?

With which type of digital signaling does the signal always return to zero volts after each bit? a. Non-return-to-zero signaling b. Unipolar signaling c....

________ is not a type of digital signaling technique.

________ is not a type of digital signaling technique. a. Non-return-to-zero signaling b. Unipolar signaling c. Manchester encoding d. Return-to-zero...

Which of the following statements is correct?

Which of the following statements is correct? a. Parallel transmission is most often used for sending data on a circuit that is made up of one wire. b....

When all bits of a character are transferred one after another, the bits are transferred in ___________ mode.

When all bits of a character are transferred one after another, the bits are transferred in ___________ mode. a. serial b. frequency division c....

The representation of the character A by the group of 8 bits, 10000001, is an example of:

The representation of the character A by the group of 8 bits, 10000001, is an example of: a. digital coding b. phase modulation c. binary modulation d....

Under one type of ASCII, each character is represented by 7 bits. That means that there are ________ valid combinations that can represent different characters.

Under one type of ASCII, each character is represented by 7 bits. That means that there are ________ valid combinations that can represent different...

_____ is one of the most commonly used coding schemes used in data transmission.

_____ is one of the most commonly used coding schemes used in data transmission. a. ASCII b. ISDN c. MAU d. ATM e. FDM Answer: ASC...

Which of the following is a byte, under the normal definition?

Which of the following is a byte, under the normal definition? a. 1 b. a special character that is used for Apple computers only c. 0 d. 325 e. 8...

Transmission speeds:

Transmission speeds: a. are the same among all media b. are not a factor in selecting a media because all media have more than enough speed to serve...

Which of the following media is the least secure?

Which of the following media is the least secure?  a. coaxial cable b. unshielded twisted pair c. shielded twisted pair d. fiber optic cable e....

Which of the following is not an important factor to consider when selecting media to be used in a network?

Which of the following is not an important factor to consider when selecting media to be used in a network?  a. prestige value of the type of...

_________ refers to the time it takes for a signal to travel from sender to recipient (highly exaggerated with satellite transmission).

_________ refers to the time it takes for a signal to travel from sender to recipient (highly exaggerated with satellite transmission). a. Line-of-sight...

Microwave transmission:

Microwave transmission:  a. is a type of high frequency radio communication b. requires a clear line-of-sight path c. is typically used for...

________ is a line-of-sight type of wireless media.

________ is a line-of-sight type of wireless media. a. coaxial cable b. microwave c. radio d. twisted pair e. fiber optic Answer: microwa...

Which of the following media can best withstand harsh environmental conditions?

Which of the following media can best withstand harsh environmental conditions?  a. shielded twisted pair b. unshielded twisted pair c. Cat...

Another term for the weakening of a signal over distance is:

Another term for the weakening of a signal over distance is:  a. turnaround time b. propagation delay c. dispersion d. insulation e. attenuation Answer:...

The earliest type of fiber optic systems were:

The earliest type of fiber optic systems were:  a. Graded index multimode b. Attenuated c. Multimode d. Single mode e. Step mode Answer: ...

Which of the following would be considered a type of wireless media?

Which of the following would be considered a type of wireless media?  a. unshielded twisted pair b. shielded twisted pair c. coaxial cable d....

The two basic types of media are:

The two basic types of media are:  a. statistical and frequency b. guided and wireless (radiated) c. local and wide area d. attenuator and Gaussian e....

A(n) __________ circuit is another name for a multipoint configuration.

A(n) __________ circuit is another name for a multipoint configuration. a. analog b. dedicated c. point-to-point d. shared e. simplexed Answer:...

In the future, most long distance transmission (voice, data, and video) will be sent using:

In the future, most long distance transmission (voice, data, and video) will be sent using: a. analog transmission b. digital transmission c. unipolar...

Which of the following is not a key advantage of digital transmission?

Which of the following is not a key advantage of digital transmission? a. It permits only low transmission rates. b. It is more efficient. c. It is...

Analog data can be transmitted over a digital network by using a special device called a:

Analog data can be transmitted over a digital network by using a special device called a: a. digitizer b. analog converter c. protocol converter d....

In general, networks designed to transmit primarily computer data are likely to be ________, while networks designed to transmit voice data are likely to be ________.

In general, networks designed to transmit primarily computer data are likely to be ________, while networks designed to transmit voice data are likely...

Two fundamentally different types of data are:

Two fundamentally different types of data are: a. DSL and ADSL b. asymmetric and symmetric c. Microsoft and IBM d. digital and analog e. local area...

Data is physically transmitted from one computer or terminal to another in the ________ layer.

Data is physically transmitted from one computer or terminal to another in the ________ layer. a. physical b. transport c. application d. terminal e....