Question 1

The acronym,Modem,stands for _________________.

Accepted Answer

A)  multiplexing/demultiplexing 
B)  more/demote 
C)  Mode-M technique 
D)  modulator/demodulator 
E)  Mod emulation technique 
A)  multiplexing/demultiplexing 
B)  more/demote 
C)  Mode-M technique 
D)  modulator/demodulator 
E)  Mod emulation technique

Question 2

The height of a sound wave is called its:

Accepted Answer

A)  frequency 
B)  phase 
C)  amplitude 
D)  bandwidth 
E)  furlong 
A)  frequency 
B)  phase 
C)  amplitude 
D)  bandwidth 
E)  furlong

Question 3

In simplex transmission,the data flows in both directions at the same time

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)  24 
B)  16 
C)  2 
D)  8 
E)  4 
A)  24 
B)  16 
C)  2 
D)  8 
E)  4

Question 5

Frequency division multiplexing is used on twisted-pair cabling.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following media has the lowest error rates and the highest transmission speeds?

Accepted Answer

A)  Coaxial cable 
B)  unshielded twisted pair 
C)  shielded twisted pair 
D)  fiber optic cable 
E)  infrared 
A)  Coaxial cable 
B)  unshielded twisted pair 
C)  shielded twisted pair 
D)  fiber optic cable 
E)  infrared

Question 7

Radio,microwave and satellite are all examples of guided media.

Accepted Answer

A) True 
 B)False

Question 8

Serial mode transmission is much faster than parallel mode transmission.

Accepted Answer

A) True 
 B)False

Question 9

Transmission speeds:

Accepted Answer

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 current communication demands 
C)  are a constant, 56Kbps, for all media types 
D)  differ widely among media 
E)  always have a direct correlation with security 
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 current communication demands 
C)  are a constant, 56Kbps, for all media types 
D)  differ widely among media 
E)  always have a direct correlation with security

Question 10

A physical circuit refers to the transmission characteristics of the connection.

Accepted Answer

A) True 
 B)False

Question 11

___________ refers to the spreading of the signal that different parts of the signal arrive at different times at the destination.

Accepted Answer

A)  turnaround time 
B)  propagation delay 
C)  dispersion 
D)  insulation 
E)  attenuation 
A)  turnaround time 
B)  propagation delay 
C)  dispersion 
D)  insulation 
E)  attenuation

Question 12

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

Accepted Answer

A)  turnaround time 
B)  propagation delay 
C)  dispersion 
D)  insulation 
E)  attenuation 
A)  turnaround time 
B)  propagation delay 
C)  dispersion 
D)  insulation 
E)  attenuation

Question 13

Radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency.

Accepted Answer

A) True 
 B)False

Question 14

The medium is the physical matter or substance that carries the voice or data transmission.

Accepted Answer

A) True 
 B)False

Question 15

Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low to high in the middle of the signal.

Accepted Answer

A) True 
 B)False

Question 16

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)  wavelength division multiplexer 
B)  time division multiplexer 
C)  statistical time division multiplexer 
D)  frequency division multiplexer 
E)  statistical frequency division multiplexer 
A)  wavelength division multiplexer 
B)  time division multiplexer 
C)  statistical time division multiplexer 
D)  frequency division multiplexer 
E)  statistical frequency division multiplexer

Question 18

Multimode fiber is capable of longer transmission distances than single mode fiber.

Accepted Answer

A) True 
 B)False

Question 19

_________ is the basic physical layout of the circuit.

Accepted Answer

A)  point-to-point configuration 
B)  configuration 
C)  circuit configuration 
D)  circuit design 
E)  circuit plan 
A)  point-to-point configuration 
B)  configuration 
C)  circuit configuration 
D)  circuit design 
E)  circuit plan

Question 20

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

Accepted Answer

Microwave circuits and satellite circuit

The acronym,Modem,stands for _________________.

The height of a sound wave is called its:

In simplex transmission,the data flows in both directions at the same time

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

Frequency division multiplexing is used on twisted-pair cabling.

Which of the following media has the lowest error rates and the highest transmission speeds?

Radio,microwave and satellite are all examples of guided media.

Serial mode transmission is much faster than parallel mode transmission.

Transmission speeds:

A physical circuit refers to the transmission characteristics of the connection.

___________ refers to the spreading of the signal that different parts of the signal arrive at different times at the destination.

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

Radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency.

The medium is the physical matter or substance that carries the voice or data transmission.

Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low to high in the middle of the signal.

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

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

Multimode fiber is capable of longer transmission distances than single mode fiber.

_________ is the basic physical layout of the circuit.

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

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

The acronym,Modem,stands for _________________.

The height of a sound wave is called its:

In simplex transmission,the data flows in both directions at the same time

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

Frequency division multiplexing is used on twisted-pair cabling.

Which of the following media has the lowest error rates and the highest transmission speeds?

Radio,microwave and satellite are all examples of guided media.

Serial mode transmission is much faster than parallel mode transmission.

Transmission speeds:

A physical circuit refers to the transmission characteristics of the connection.

___________ refers to the spreading of the signal that different parts of the signal arrive at different times at the destination.

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

Radio data transmission requires that each device has a radio receiver/transmitter and uses a specific frequency.

The medium is the physical matter or substance that carries the voice or data transmission.

Manchester encoding is a special type of bipolar signaling in which the signal is changed from high to low or from low to high in the middle of the signal.

The "local loop" refers to the wires that run from the customer premises to the telephone switch of the telephone company.

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

Multimode fiber is capable of longer transmission distances than single mode fiber.

_________ is the basic physical layout of the circuit.

Under what circumstances would you use a microwave circuit rather than a satellite circuit?

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