Question 1

Amplitude,frequency and phase are all characteristics of a sound wave.

Accepted Answer

A) True 
 B)False

Question 2

Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.

Accepted Answer

A)  voice converter 
B)  modem 
C)  codec 
D)  multiplexer 
E)  demodulator 
A)  voice converter 
B)  modem 
C)  codec 
D)  multiplexer 
E)  demodulator

Question 3

In full-duplex transmission,two stations can send and receive simultaneously.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)  Line-of-sight effect 
B)  Multimode index 
C)  Saturation effect 
D)  Raindrop attenuation 
E)  Propagation delay 
A)  Line-of-sight effect 
B)  Multimode index 
C)  Saturation effect 
D)  Raindrop attenuation 
E)  Propagation delay

Question 5

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Accepted Answer

A)  256 
B)  20 
C)  200 
D)  512 
E)  1024 
A)  256 
B)  20 
C)  200 
D)  512 
E)  1024

Question 6

Why is data compression so useful?Describe how it works.

Accepted Answer

Data compression is incredibly useful be

Question 7

Describe four types of radiated media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

Accepted Answer

1. Infrared: Infrared radiated media use

Question 8

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

Accepted Answer

A)  8,000 
B)  8 
C)  18,000 
D)  64 
E)  256 
A)  8,000 
B)  8 
C)  18,000 
D)  64 
E)  256

Question 9

What is the term used to describe the placing of two or more signals on a single circuit?

Accepted Answer

The term used to describe the placing of

Question 10

How does analog data differ from digital data?

Accepted Answer

Analog data and digital data represent t

Question 11

Describe three types of guided media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

Accepted Answer

1. Twisted Pair Cable:
Example: Ethernet

Question 12

With modem communications,the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.

Accepted Answer

A) True 
 B)False

Question 13

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Accepted Answer

Bipolar signaling differs from unipolar

Question 14

Frequency division multiplexing divides the circuit into a set of different time slots.

Accepted Answer

A) True 
 B)False

Question 15

What is a modem?How does a modem send digital data on an analog network?Draw a schematic or diagram of this,explaining the process step by step.

Accepted Answer

A modem, short for modulator-demodulator

Question 16

Microwave transmission:

Accepted Answer

A)  is a type of high frequency radio communication 
B)  requires a clear line-of-sight path 
C)  is typically used for long distance data transmission 
D)  does not require the laying of any cable 
E)  all of the above 
A)  is a type of high frequency radio communication 
B)  requires a clear line-of-sight path 
C)  is typically used for long distance data transmission 
D)  does not require the laying of any cable 
E)  all of the above

Question 17

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

Accepted Answer

A)  V.22 
B)  V.44 
C)  V.32bis 
D)  V.34 
E)  RS 232 
A)  V.22 
B)  V.44 
C)  V.32bis 
D)  V.34 
E)  RS 232

Question 18

____________ refers to the transmission characteristics of the circuit.

Accepted Answer

A)  handshaking 
B)  virtual circuit 
C)  bonding 
D)  logical circuit 
E)  physical circuit 
A)  handshaking 
B)  virtual circuit 
C)  bonding 
D)  logical circuit 
E)  physical circuit

Question 19

ASCII is the least popular code for data communications.

Accepted Answer

A) True 
 B)False

Question 20

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

Accepted Answer

A) True 
 B)False

Amplitude,frequency and phase are all characteristics of a sound wave.

Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.

In full-duplex transmission,two stations can send and receive simultaneously.

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

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Why is data compression so useful?Describe how it works.

Describe four types of radiated media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

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

What is the term used to describe the placing of two or more signals on a single circuit?

How does analog data differ from digital data?

Describe three types of guided media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

With modem communications,the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Frequency division multiplexing divides the circuit into a set of different time slots.

What is a modem?How does a modem send digital data on an analog network?Draw a schematic or diagram of this,explaining the process step by step.

Microwave transmission:

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

____________ refers to the transmission characteristics of the circuit.

ASCII is the least popular code for data communications.

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

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

Exam 3: Physical Layer

Amplitude,frequency and phase are all characteristics of a sound wave.

Equipment used to transform analog voice signals to digital signals and digital signals to analog signals.

In full-duplex transmission,two stations can send and receive simultaneously.

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

A coding scheme that uses 10 bits to represent each character is capable of representing _________ different characters.

Why is data compression so useful?Describe how it works.

Describe four types of radiated media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

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

What is the term used to describe the placing of two or more signals on a single circuit?

How does analog data differ from digital data?

Describe three types of guided media.Give an example,describe what it looks like and how it works,and why it might be used in a scenario of a network.

With modem communications,the receiving modem converts the incoming digital signal from the telephone line into an analog signal that can be understood by the computer.

How does bipolar signaling differ from unipolar signaling? Why is Manchester encoding more popular than either? What kind of signaling is used in Ethernet?

Frequency division multiplexing divides the circuit into a set of different time slots.

What is a modem?How does a modem send digital data on an analog network?Draw a schematic or diagram of this,explaining the process step by step.

Microwave transmission:

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

____________ refers to the transmission characteristics of the circuit.

ASCII is the least popular code for data communications.

Multitasking means to break one high-speed physical communication circuit into several lower-speed logical circuits so that different devices can simultaneously use it.

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