Question 1

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 2

What is coding? Briefly describe the two most important coding schemes.

Accepted Answer

Coding is the process of creating instru

Question 3

An) ___________ 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

Serial mode transmission is much faster than parallel mode transmission.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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

Accepted Answer

A) True 
 B)False

Question 7

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 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Digital transmission permits higher maximum transmission rates when compared to analog.

Accepted Answer

A) True 
 B)False

Question 11

Of all the media available, fiber optic provides the highest transmission speeds.

Accepted Answer

A) True 
 B)False

Question 12

Nonreturn to zero is a type of unipolar signaling

Accepted Answer

A) True 
 B)False

Question 13

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 14

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

Data rate and symbol rate are both measu

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

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

Accepted Answer

A) True 
 B)False

Question 17

Explain two reasons why the use of twisted pair cable is becoming more common than the use of coax cable?

Accepted Answer

There are two main reasons why the use o

Question 18

The representation of the character A by the group of 8 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 19

Microwave transmissions require a line of sight between any two points.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

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

What is coding? Briefly describe the two most important coding schemes.

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

Serial mode transmission is much faster than parallel mode transmission.

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

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

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

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

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

Digital transmission permits higher maximum transmission rates when compared to analog.

Of all the media available, fiber optic provides the highest transmission speeds.

Nonreturn to zero is a type of unipolar signaling

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.

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.

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

Explain two reasons why the use of twisted pair cable is becoming more common than the use of coax cable?

The representation of the character A by the group of 8 bits, 01000001, is an example of:

Microwave transmissions require a line of sight between any two points.

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

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 3: Physical Layer

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

What is coding? Briefly describe the two most important coding schemes.

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

Serial mode transmission is much faster than parallel mode transmission.

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

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

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

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

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

Digital transmission permits higher maximum transmission rates when compared to analog.

Of all the media available, fiber optic provides the highest transmission speeds.

Nonreturn to zero is a type of unipolar signaling

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.

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.

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

Explain two reasons why the use of twisted pair cable is becoming more common than the use of coax cable?

The representation of the character A by the group of 8 bits, 01000001, is an example of:

Microwave transmissions require a line of sight between any two points.

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

Introduction to Data Communications

Application Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Backbone Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters