Question 1

Describe how data could be transmitted using amplitude modulation.

Accepted Answer

Amplitude modulation (AM) is a method of

Question 2

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 3

A walkie-talkie is an example of half-duplex transmission.

Accepted Answer

A) True 
 B)False

Question 4

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 5

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 6

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 7

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 8

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 9

Describe the six subsystems of TIA/EIA 568-B.

Accepted Answer

The six subsystems of TIA/EIA 568-B are:

Question 10

_____________ refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog data to digital signals.

Accepted Answer

A) quantizing error 
B) handshaking phase 
C) modulating frequency 
D) POTS anomaly 
E) amplitude Trellis effect 
A) quantizing error 
B) handshaking phase 
C) modulating frequency 
D) POTS anomaly 
E) amplitude Trellis effect

Question 11

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz, the bandwidth available for this circuit is :

Accepted Answer

A) 890 Hz 
B) 8900 HZ 
C) 9100 Hz 
D) 9Khz 
E) 890 KHz 
A) 890 Hz 
B) 8900 HZ 
C) 9100 Hz 
D) 9Khz 
E) 890 KHz

Question 12

When you send an email from the US to Europe, it likely is transmitted from one continent to another through one of the ______ that connect America and Europe.

Accepted Answer

A) submarine cables 
B) satellites 
C) telephone lines 
D) boats 
E) modems 
A) submarine cables 
B) satellites 
C) telephone lines 
D) boats 
E) modems

Question 13

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 14

The typical range of human hearing is:

Accepted Answer

A) 0 to 4,000 Hz 
B) 0 to 1,200 Hz 
C) 20 to 14,000 Hz 
D) 0 to 300 Hz 
E) 0 to 56,000 Hz 
A) 0 to 4,000 Hz 
B) 0 to 1,200 Hz 
C) 20 to 14,000 Hz 
D) 0 to 300 Hz 
E) 0 to 56,000 Hz

Question 15

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

Accepted Answer

A) pulse code modulation 
B) adaptive differential pulse code modulation 
C) Voice conversation 
D) code modulation 
E) phase modulation 
A) pulse code modulation 
B) adaptive differential pulse code modulation 
C) Voice conversation 
D) code modulation 
E) phase modulation

Question 16

____________ 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 17

_____________ is not a form of modulation used to transform digital data into analog signals.

Accepted Answer

A) synchronous time division 
B) amplitude shift keying 
C) amplitude modulation 
D) frequency modulation 
E) phase modulation 
A) synchronous time division 
B) amplitude shift keying 
C) amplitude modulation 
D) frequency modulation 
E) phase modulation

Question 18

WDM is a version of FDM used in fiber-optic cables.

Accepted Answer

A) True 
 B)False

Question 19

Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.

Accepted Answer

A) True 
 B)False

Question 20

Newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission.

Accepted Answer

A) True 
 B)False

Describe how data could be transmitted using amplitude modulation.

The acronym, Modem, stands for _________________.

A walkie-talkie is an example of half-duplex transmission.

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.

Transmission speeds:

The earliest type of fiber optic systems were:

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

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

Describe the six subsystems of TIA/EIA 568-B.

_____________ refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog data to digital signals.

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz, the bandwidth available for this circuit is :

When you send an email from the US to Europe, it likely is transmitted from one continent to another through one of the ______ that connect America and Europe.

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.

The typical range of human hearing is:

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

____________ refers to the transmission characteristics of the circuit.

_____________ is not a form of modulation used to transform digital data into analog signals.

WDM is a version of FDM used in fiber-optic cables.

Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.

Newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission.

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

Describe how data could be transmitted using amplitude modulation.

The acronym, Modem, stands for _________________.

A walkie-talkie is an example of half-duplex transmission.

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.

Transmission speeds:

The earliest type of fiber optic systems were:

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

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

Describe the six subsystems of TIA/EIA 568-B.

_____________ refers to the difference between the original analog data and the approximation of that data using the techniques for translating from analog data to digital signals.

If the highest frequency of a circuit is 10KHZ and the lowest frequency is 900 Hz, the bandwidth available for this circuit is :

When you send an email from the US to Europe, it likely is transmitted from one continent to another through one of the ______ that connect America and Europe.

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.

The typical range of human hearing is:

____________ is used by IM and other applications that provide voice services over lower-speed digital circuits.

____________ refers to the transmission characteristics of the circuit.

_____________ is not a form of modulation used to transform digital data into analog signals.

WDM is a version of FDM used in fiber-optic cables.

Time division multiplexing is more efficient that frequency division multiplexing because the guardbands used in the frequency division multiplexing or not needed.

Newer telephone circuits, built during the last decade, offer higher quality because they were built using analog transmission.

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