Question 1

Time (non-statistical)division multiplexing differs from frequency division multiplexing because it:

Accepted Answer

A)  does not share a communication circuit 
B)  splits the communication circuit vertically (with time slots) instead of horizontally 
C)  increases the wavelength and phase angles of the baseband frequency used for transmission 
D)  moves the baseband of a circuit by shifting it to a higher frequency 
E)  reduces baseband signal velocity more than frequency division multiplexing 
A)  does not share a communication circuit 
B)  splits the communication circuit vertically (with time slots) instead of horizontally 
C)  increases the wavelength and phase angles of the baseband frequency used for transmission 
D)  moves the baseband of a circuit by shifting it to a higher frequency 
E)  reduces baseband signal velocity more than frequency division multiplexing

Question 2

Baud rate is the number of bits transmitted per second.

Accepted Answer

A) True 
 B)False

Question 3

The representation of the character A by the group of8 bits,01000001,is an example of:

Accepted Answer

A)  digital coding 
B)  phase modulation 
C)  binary modulation 
D)  analog transmission 
E)  pitch variation 
A)  digital coding 
B)  phase modulation 
C)  binary modulation 
D)  analog transmission 
E)  pitch variation

Question 4

Digital transmission occurs when the signal sent over the transmission media constantly varies among an infinite number of states.

Accepted Answer

A) True 
 B)False

Question 5

Compare and contrast data rate (i.e.,bits per second)and symbol rate (also called baud rate)by giving two concrete,different examples.

Accepted Answer

The answer of Compare and contrast data rate (i.e.,bits per...

Question 6

Which of the following statements is correct?

Accepted Answer

A)  Parallel transmission is most often used for sending data on a circuit that is made up of one wire. 
B)  Parallel transmission is distinguished from serial transmission by the fact that the transmitting device sends a single bit, then a second bit, and so on, until all the bits are transmitted. 
C)  Parallel transmission is only used for analog data. 
D)  Serial transmission is slower than parallel transmission. 
E)  Parallel transmission is the same as serial transmission. 
A)  Parallel transmission is most often used for sending data on a circuit that is made up of one wire. 
B)  Parallel transmission is distinguished from serial transmission by the fact that the transmitting device sends a single bit, then a second bit, and so on, until all the bits are transmitted. 
C)  Parallel transmission is only used for analog data. 
D)  Serial transmission is slower than parallel transmission. 
E)  Parallel transmission is the same as serial transmission.

Question 7

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

Accepted Answer

A)  coaxial cable 
B)  microwave 
C)  radio 
D)  twisted pair 
E)  fiber optic 
A)  coaxial cable 
B)  microwave 
C)  radio 
D)  twisted pair 
E)  fiber optic

Question 8

If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is?

Accepted Answer

A)  128 Kbps 
B)  64 Kbps 
C)  12800 bps 
D)  96 Kbps 
E)  32000 bps 
A)  128 Kbps 
B)  64 Kbps 
C)  12800 bps 
D)  96 Kbps 
E)  32000 bps

Question 9

With nonreturn to zero signaling,the voltage alternates between zero and a positive or negative voltage.

Accepted Answer

A) True 
 B)False

Question 10

One way to reduce quantizing errors is to increase the sampling rate of the analog signal.

Accepted Answer

A) True 
 B)False

Question 11

What are the three important characteristics of a sound wave?

Accepted Answer

The three important characteristics of a

Question 12

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

Accepted Answer

A)  prestige value of the type of media 
B)  type of network 
C)  cost 
D)  transmission distance 
E)  security 
A)  prestige value of the type of media 
B)  type of network 
C)  cost 
D)  transmission distance 
E)  security

Question 13

Is the bit rate the same as the symbol rate? Explain.

Accepted Answer

No, the bit rate is not the same as the

Question 14

Describe how data could be transmitted using a combination of modulation techniques.

Accepted Answer

Data can be transmitted using a combinat

Question 15

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

Accepted Answer

A)  bandwidth modulation 
B)  amplitude modulation 
C)  frequency modulation 
D)  phase modulation 
E)  codec modulation 
A)  bandwidth modulation 
B)  amplitude modulation 
C)  frequency modulation 
D)  phase modulation 
E)  codec modulation

Question 16

Ethernet,a common LAN technology,uses Manchester encoding.

Accepted Answer

A) True 
 B)False

Question 17

_____________ can be thought of as dividing the circuit horizontally.

Accepted Answer

A)  Frequency division multiplexing 
B)  Statistical frequency division multiplexing 
C)  Statistical time division multiplexing 
D)  Time division multiplexing 
E)  Wavelength division multiplexing 
A)  Frequency division multiplexing 
B)  Statistical frequency division multiplexing 
C)  Statistical time division multiplexing 
D)  Time division multiplexing 
E)  Wavelength division multiplexing

Question 18

Frequency modulation refers to the changing of the height of the sound wave.

Accepted Answer

A) True 
 B)False

Question 19

What is the difference between multiplexing and modulation? Why are each important? Draw a picture that shows a sample of multiplexing at work (a specific kind)and modulation at work (a specific kind).

Accepted Answer

Multiplexing and modulation are both imp

Question 20

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

Accepted Answer

A)  analog 
B)  dedicated 
C)  point-to-point 
D)  shared 
E)  simplex 
A)  analog 
B)  dedicated 
C)  point-to-point 
D)  shared 
E)  simplex

Time (non-statistical)division multiplexing differs from frequency division multiplexing because it:

Baud rate is the number of bits transmitted per second.

The representation of the character A by the group of8 bits,01000001,is an example of:

Digital transmission occurs when the signal sent over the transmission media constantly varies among an infinite number of states.

Compare and contrast data rate (i.e.,bits per second)and symbol rate (also called baud rate)by giving two concrete,different examples.

Which of the following statements is correct?

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

If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is?

With nonreturn to zero signaling,the voltage alternates between zero and a positive or negative voltage.

One way to reduce quantizing errors is to increase the sampling rate of the analog signal.

What are the three important characteristics of a sound wave?

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

Is the bit rate the same as the symbol rate? Explain.

Describe how data could be transmitted using a combination of modulation techniques.

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

Ethernet,a common LAN technology,uses Manchester encoding.

_____________ can be thought of as dividing the circuit horizontally.

Frequency modulation refers to the changing of the height of the sound wave.

What is the difference between multiplexing and modulation? Why are each important? Draw a picture that shows a sample of multiplexing at work (a specific kind)and modulation at work (a specific kind).

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

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Wired and Wireless LANs

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Design

Network Management

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Exam 3: Physical Layer

Time (non-statistical)division multiplexing differs from frequency division multiplexing because it:

Baud rate is the number of bits transmitted per second.

The representation of the character A by the group of8 bits,01000001,is an example of:

Digital transmission occurs when the signal sent over the transmission media constantly varies among an infinite number of states.

Compare and contrast data rate (i.e.,bits per second)and symbol rate (also called baud rate)by giving two concrete,different examples.

Which of the following statements is correct?

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

If each sample uses 16 bits and the number of samples taken each second is 8000; then the transmission speed on the circuit is?

With nonreturn to zero signaling,the voltage alternates between zero and a positive or negative voltage.

One way to reduce quantizing errors is to increase the sampling rate of the analog signal.

What are the three important characteristics of a sound wave?

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

Is the bit rate the same as the symbol rate? Explain.

Describe how data could be transmitted using a combination of modulation techniques.

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

Ethernet,a common LAN technology,uses Manchester encoding.

_____________ can be thought of as dividing the circuit horizontally.

Frequency modulation refers to the changing of the height of the sound wave.

What is the difference between multiplexing and modulation? Why are each important? Draw a picture that shows a sample of multiplexing at work (a specific kind)and modulation at work (a specific kind).

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

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Wired and Wireless LANs

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Design

Network Management

Filters