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ECE 4C > WIRED COMMUNICATIONS (prelim) > Flashcards

WIRED COMMUNICATIONS (prelim) Flashcards

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1
Q

The transmission of data over a wire-based communication technology.

A

Wired Communications

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2
Q

It allows more than one signal to be transmitted in a single medium

A

Multiplexing

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3
Q

Wired line used for high-power applications

A

Waveguides

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4
Q

The three basic components of the optical transmission system

A

Light source
Transmission media
Detector

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5
Q

A type of medium that transmits information in the form of light

A

Fiber Optic

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6
Q

This signal is a continuous signal that varies in amplitude or frequency over time and represents information.

A

Analog Signal

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7
Q

This signal is a discrete signal, typically represented by binary values (0s and 1s), used for representing information.

A

Discrete Signal

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8
Q

An electronic device that converts information into a signal suitable for transmission over a medium.

A

Transmitter

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9
Q

An electronic device that detects and interprets the transmitted signal to retrieve the original information.

A

Receiver

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10
Q

Another term for the demodulation process

A

Detection

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11
Q

A type of medium that is immune to Electromagnetic interference

A

Fiber Optic

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12
Q

Type of medium that transmits signals or data in the form of electronic signals

A

Copper Wire

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13
Q

This type of medium has a high bandwidth

A

Fiber Optic

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14
Q

This type of medium is prone to corrosion

A

Copper wire

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15
Q

One of the disadvantages of this medium is its limited bandwidth

A

Copper Wire

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16
Q

This type of medium has high attenuation

A

Copper wire

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17
Q

It is the term for information, audio and voice signals

A

Intelligence

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18
Q

The physical path over which a signal can travel

A

Communication Circuit

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19
Q

The actual path for the signal to travel

A

Communication Channel

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20
Q

This circuit uses AD and DC to carry signal

A

Electric Circuit

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21
Q

This uses rapidly varying current to carry signal

A

Electromagnetic Circuit

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22
Q

This uses light as the data carrier on a transparent media

A

Photonic Circuits

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23
Q

It is used for types of remote control electrical equipment and in some LANs

A

Power Line Communication

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24
Q

It is when electronic signals are added to power line voltages

A

Power Line Communications

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25
Q

It is the unwanted coupling between the signal path

A

Crosstalk

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26
Q

When the signal from one cable leaks with another pair

A

Crosstalk

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27
Q

This avoids crosstalk

A

Twisting cables

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28
Q

This type of cable is commonly used as an Ethernet cable

A

Unshielded Twisted Pair

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28
Q

It is the radiation of one signal to another

A

crosstalk

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28
Q

This type of cable is best suited in high interference environment

A

Shielded Twisted Pair

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29
Q

This cable has an individual pair of wires wrapped in foil and then are wrapped again for double protection

A

Shielded Twisted Pair

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30
Q

This cable has each pair of ire twisted together and then wrapped in tubing without any other protection

A

Unshielded Twisted Pair

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30
Q

Which part of the coaxial cable is shielded?

A

Ground

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30
Q

The bandwidth for coaxial cable

A

300MHZ, 500MHZ, 750MHZ

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30
Q

This type of wire is commonly used in telephone system

A

Twisted Pair

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31
Q

This cable is used in Ethernet networks

A

Twisted Pair

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31
Q

This technique reduces electromagnetic interference from external sources

A

Twisting of wires

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32
Q

This wire provides varying levels of protection against signal degradation and interference.

A

Twisted Pair

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33
Q

two types of Twisted pair wire

A

Shielded Twisted Pair
Unshielded Twisted Pair

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34
Q

It is the reduction of the signal as it travels in the medium

A

Attenuation

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35
Q

This helps the signal to keep a constant level as it travels through the medium

A

amplifiers

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36
Q

This cable has the greatest bandwidth among the three types of cable

A

Fiber Optic Cable

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37
Q

This cable is made up of very small one-way glass strands.

A

Fiber Optic Cable

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38
Q

This cable is commonly used in highspeed backbones

A

Fiber Optic Cable

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39
Q

This cable uses light rather than electricity

A

Fiber Optic Cable

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40
Q

The process of making the information more suitable for the medium

A

Modulation

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41
Q

This process allows more than one signal to be transmitted over a single medium

A

Multiplexing

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42
Q

The device which converts signals from Analog to Digital and back again

A

Modem

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43
Q

The high-frequency signal is added to the original signal to allow transmission over long distances

A

Carrier

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44
Q

A fiber optic technique that employs multiple light wavelengths to transmit data

A

Dense Wave Division Multiplexing

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45
Q

Frequency range used in power lines

A

ELF

46
Q

The frequency range known as subcarriers is mostly used in aeronautical and marine communications

A

LF

47
Q

range for infrared

A

100 to 0.7 micrometers

48
Q

range for ultraviolet

A

4 to 400 nanometers

49
Q

Type of wireless transmission media that distribute signals through air over long distances

A

Broadcast Radio

50
Q

Type of wireless transmission media used in mobile communications

A

Cellular Radio

51
Q

Type of wireless transmission media that uses HF range to transmit voice or data

A

Cellular Radio

52
Q

This type of wireless transmission media provides highspeed transmission

A

Microwave

53
Q

Wireless transmission media that uses infrared to transmit data

A

Infrared

54
Q

Type of twisted pair cable that has a 10 Mbps transfer rate

A

10-BaseT (Ethernet)

55
Q

Type of twisted pair cable that has a 100 Mbps transfer rate

A

100-BaseT (Fast Ethernet)

56
Q

Type of twisted pair cable that has a 1000 Mbps transfer rate

A

1000-BaseT (Gigabit Ethernet)

57
Q

Type of twisted pair cable that has a 4-16 Mbps transfer rate

A

Token Ring

58
Q

Two types of coaxial cable that have 10Mbps transfer rate

A

10-Base2 (Ethernet)
10-Base5 (Fast Ethernet)

59
Q

Type of fiber optic that has a 10Mbps transfer rate

A

10-BaseF (Ethernet)

60
Q

Type of fiber optic that has a 100Mbps transfer rate

A

10-BaseFX (Fast Ethernet)

61
Q

what does FDDI mean?

A

Fiber Distributed Data Interface

62
Q

A one-way electronic communication

A

Simplex

63
Q

Radio Broadcasting is what type of communication?

A

Simplex

64
Q

A two-way communication in which both parties can transmit and receive simultaneously

A

Full Duplex

65
Q

A two-way communication in which both parties can transmit and receive signals one at a time

A

Half Duplex

66
Q

How many times an event occur at a time

A

Frequency

67
Q

The distance between two points of a similar periodic wave

A

Wavelength

68
Q

The distance travelled by an electromagnetic wave in one cycle

A

wavelength

69
Q

The portion of the electromagnetic spectrum that is occupied by a signal

A

bandwidth

70
Q

The range of frequencies in which signals are transmitted

A

bandwidth

71
Q

Also known as myriametric signal

A

VLF

72
Q

Also known as kilometric signal

A

LFA

73
Q

known as hectometric signal

A

MF

74
Q

High frequencies are also known as

A

decametric signal

75
Q

other term for very high frequencies

A

metric signals

76
Q

other term for ultrahigh frequencies

A

decimetric signals

77
Q

widely used in satellite communications

A

EHF

78
Q

What is the other term for SHF

A

centimetric signal

79
Q

also known as EHF

A

millimetric signals

80
Q

commonly used in satellite and radar communications

A

EHF

81
Q

indicates the relationship between two power

A

decibel

82
Q

The oldest form of communication recorded in history. It is used during war

A

Smoke signals

83
Q

The greek word “helios” means

A

sun

84
Q

It is a type of early communication in which it uses mirror, sun, and morse code to transfer messages wirelessly

A

Heliograph

85
Q

The Greek word for write is

A

Graphien

86
Q

who invented the semaphore?

A

Mr. Claude Chappe

87
Q

When did Chappe invent the semaphore?

A

1794

88
Q

This early communication system used a flag-based alphabet

A

semaphore

89
Q

who discovered the effect of electrolytic decomposition to
devise an electric telegraph.

A

Samuel Soemmerring

90
Q

A type of device used for communication over long distances in which the message can be read by the amount of gases the electrolysis caused

A

Electromechanical telegraph

91
Q

He discovered the effect of electrolytic decomposition to
devise an electric telegraph.

A

Samuel Soemmering

92
Q

It is the first successful electric telecommunication device

A

Needle telegraph

93
Q

Who patented the needle telegraph?

A

Charles Wheatstone and William Fothergill

94
Q

It is the first successful and practical data communication code to transmit info

A

Morse’s Telegraph

95
Q

A type of telegraph that alphabets and numbers are placed at the edge of a circular plate

A

Dial Telegraph

96
Q

He developed the automatic telegraph

A

Thomas Edison

97
Q

A device that uses messages encoded on perforated paper

A

Automatic Telegraph

98
Q

A 28-key piano-like device that transmits information by pressing the key corresponding to the letter.

A

Printing Telegraph

99
Q

who invented the printing telegraph?

A

Royal Earl House

100
Q

He invented the string telephone

A

Robert Hooke

101
Q

A communication device in which it transmits data in long wires through mechanical vibrations.

A

String Telephone

102
Q

what are the two other terms for string telephone?

A

Acoustic telephone and Mechanical telephone

103
Q

He developed the speaking telegraph

A

Innocenzo Manzetti

104
Q

when did Innocenzo Manzetti invent the speaking telegraph?

A

1843

105
Q

He suggested that sound could be transmitted electrically

A

Charles Boursel (1854)

106
Q

He developed a voice communication in his house and called it “telettrofoni”

A

Antonio Meucci

107
Q

When did Meucci develop telettrofoni in his house?

A

1857

108
Q

He developed a device that could transmit electrical notes

A

Johann Philipp Reis (1860)

109
Q

He described his device “Telephon”

A

Johann Philipp Reis (1860)

110
Q

He designed a voice transmitter consisting of a cavity filled with
granules of carbonized anthracite coal.

A

Thomas Alva Edison

111
Q

when did the concept of mounting the transmitter and receiver in the same handle?

A

1878

112
Q

When was the first commercial telephone available?

A

1877

113
Q

The year AT&T produced the wall magneto telephone

A

1907

114
Q

the year desk telephones are available

A

1897

115
Q

The year AT&T introduced the E1A Headset

A

1927

116
Q

The year when the first telephone that has all components in a single apparatus

A

1937

117
Q

The year push-button telephones are available

A

1963

118
Q

VoIP meaning

A

Voice over Internet Protocol

119
Q

The first combined telephone and personal digital assistant

A

IBM Simon

ECE 4C (5 decks)

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