Question 1

Which of the following is the most secure wired media?

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 2

Multiplexing increases the cost of provisioning network circuits.

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)  transponder 
B)  multiplexer 
C)  inverse multiplexer 
D)  codec 
E)  intelligent terminal 
A)  transponder 
B)  multiplexer 
C)  inverse multiplexer 
D)  codec 
E)  intelligent terminal

Question 4

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

Accepted Answer

A)  ASCII 
B)  ISDN 
C)  MAU 
D)  ATM 
E)  FDM 
A)  ASCII 
B)  ISDN 
C)  MAU 
D)  ATM 
E)  FDM

Question 5

If you were buying a multiplexer,why would you choose either TDM or FDM?

Accepted Answer

When deciding between a Time Division Mu

Question 6

Bandwidth is the difference between the highest and lowest frequencies in a band.

Accepted Answer

A) True 
 B)False

Question 7

What is the typical sampling network in telephony?Why is a higher sampling rate more effective for sound quality?

Accepted Answer

The typical sampling network in telephon

Question 8

___________ is not a type of digital signaling technique.

Accepted Answer

A)  Non-return-to-zero signaling 
B)  Unipolar signaling 
C)  Manchester encoding 
D)  Return-to-zero signaling 
E)  Data rate signaling 
A)  Non-return-to-zero signaling 
B)  Unipolar signaling 
C)  Manchester encoding 
D)  Return-to-zero signaling 
E)  Data rate signaling

Question 9

Nonreturn to zero is a type of unipolar signaling

Accepted Answer

A) True 
 B)False

Question 10

The earliest type of fiber optic systems were:

Accepted Answer

A)  Graded index multimode 
B)  Attenuated 
C)  Multimode 
D)  Single mode 
E)  Step mode 
A)  Graded index multimode 
B)  Attenuated 
C)  Multimode 
D)  Single mode 
E)  Step mode

Question 11

How is data transmitted in parallel? What feature distinguishes serial mode from parallel mode?

Accepted Answer

Data transmission can occur in two prima

Question 12

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

Accepted Answer

A)  shielded twisted pair 
B)  unshielded twisted pair 
C)  Cat 5 twisted pair 
D)  coaxial cable 
E)  fiber optic cable 
A)  shielded twisted pair 
B)  unshielded twisted pair 
C)  Cat 5 twisted pair 
D)  coaxial cable 
E)  fiber optic cable

Question 13

What is the purpose of multiplexing? How does it work?Multiplexing usually is done in multiples of _______ ? Of the different types of multiplexing,what distinguishesa.Frequency division multiplexing (FDM)?(describe and draw a sketch of this)
b.Time division multiplexing (TDM)?(describe and draw a sketch of this)
c.Statistical time division multiplexing (STDM)? (describe and draw a sketch of this)
d.Wavelength division multiplexing (WDM)?(describe)

Accepted Answer

The answer of What is the purpose of multiplexing? How...

Question 14

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

Accepted Answer

A)  amplitude, which our ears detect as loudness 
B)  frequency, which our ears detect as pitch 
C)  phase 
D)  bandwidth 
E)  furlong 
A)  amplitude, which our ears detect as loudness 
B)  frequency, which our ears detect as pitch 
C)  phase 
D)  bandwidth 
E)  furlong

Question 15

Clearly explain the differences between analog data,analog transmission,digital data,and digital transmission.

Accepted Answer

Analog data refers to information that i

Question 16

Describe how data could be transmitted using phase modulation.Draw this.

Accepted Answer

Phase modulation is a method of transmit

Question 17

In a multipoint circuit configuration,each computer has a dedicated circuit between itself and each of the other computers in the network

Accepted Answer

A) True 
 B)False

Question 18

Fiber optic cable can only be used on LANs.

Accepted Answer

A) True 
 B)False

Question 19

Describe two common modem standards.

Accepted Answer

Two common modem standards that have bee

Question 20

The two basic types of media are:

Accepted Answer

A)  statistical and frequency 
B)  guided and wireless (radiated) 
C)  local and wide area 
D)  attenuator and Gaussian 
E)  duplexed and non-duplexed 
A)  statistical and frequency 
B)  guided and wireless (radiated) 
C)  local and wide area 
D)  attenuator and Gaussian 
E)  duplexed and non-duplexed

Which of the following is the most secure wired media?

Multiplexing increases the cost of provisioning network circuits.

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

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

If you were buying a multiplexer,why would you choose either TDM or FDM?

Bandwidth is the difference between the highest and lowest frequencies in a band.

What is the typical sampling network in telephony?Why is a higher sampling rate more effective for sound quality?

___________ is not a type of digital signaling technique.

Nonreturn to zero is a type of unipolar signaling

The earliest type of fiber optic systems were:

How is data transmitted in parallel? What feature distinguishes serial mode from parallel mode?

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

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

Clearly explain the differences between analog data,analog transmission,digital data,and digital transmission.

Describe how data could be transmitted using phase modulation.Draw this.

In a multipoint circuit configuration,each computer has a dedicated circuit between itself and each of the other computers in the network

Fiber optic cable can only be used on LANs.

Describe two common modem standards.

The two basic types of media are:

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

Which of the following is the most secure wired media?

Multiplexing increases the cost of provisioning network circuits.

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

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

If you were buying a multiplexer,why would you choose either TDM or FDM?

Bandwidth is the difference between the highest and lowest frequencies in a band.

What is the typical sampling network in telephony?Why is a higher sampling rate more effective for sound quality?

___________ is not a type of digital signaling technique.

Nonreturn to zero is a type of unipolar signaling

The earliest type of fiber optic systems were:

How is data transmitted in parallel? What feature distinguishes serial mode from parallel mode?

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

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

Clearly explain the differences between analog data,analog transmission,digital data,and digital transmission.

Describe how data could be transmitted using phase modulation.Draw this.

In a multipoint circuit configuration,each computer has a dedicated circuit between itself and each of the other computers in the network

Fiber optic cable can only be used on LANs.

Describe two common modem standards.

The two basic types of media are:

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