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QUIZ 1 Flashcards

1
Q

is the transfer of data or information between a source and a receiver. The source transmits the data and the receiver receives it.

A

DATA COMMUNICATION

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2
Q

are the exchange of data between two devices via some form of transmission medium such as a wire cable.

A

Data communications

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3
Q

” refers to information presented in whatever form is agreed upon by the parties creating and
using the data.

A

data

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4
Q

The purpose of this is to provide the rules and regulations that allow computers with
different disk operating systems, languages, cabling and locations to share resources.

A

Data Communications

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5
Q

information that is stored in digital form

A

Data

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6
Q
  • is defined as knowledge or intelligence
A

Information

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7
Q
  • is a set of devices interconnected by
    media links
A

Network

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8
Q

a global computer network providing a
variety of information and communication
facilities, consisting of interconnected networks
using standardized communication protocols

A

Internet

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9
Q

A proposal was submitted to a Scottish magazine suggested running a communications line between
villages comprised of 26 parallel wires, each wire for one letter of the alphabet.

A

1753

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10
Q

Carl Friedrich Gauss developed an unusual system based on a five-by-five matrix representing 25
letters (I and J were combined)

A

1833

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11
Q

Samuel F.B. Morse invented the first successful and practical data communications system which he
called the Telegraph. With the telegraph, dots and dashes are transmitted across a wire through
eletromechanical induction. He also developed the first practical data communications code which we all know
as the Morse Code

A

1832

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12
Q

invented the first successful and practical data communications system which he
called the Telegraph

A

Samuel F.B. Morse

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13
Q

first successful and practical data communications system

A

Telegraph

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14
Q

dots and dashes are transmitted across a wire through
eletromechanical induction

A

Telegraph

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15
Q

Developed the first practical data communications code which we all know as the Morse Code

A

Samuel F.B. Morse

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16
Q

the first practical data communications code

A

Morse code

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17
Q

Morse secured an American patent for his telegraph

A

1840

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18
Q

The first telegraph line was established between Baltimore and Washington D.C “What hath God
wrought!”

A

1844

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19
Q

the first slow-speed telegraph printer was invented

A

1849

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20
Q

the first high-speed (15-bps) printers were available

A

1860

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21
Q

Emile Baudot invented a telegraph multiplexer which allowed signals up to six different telegraph
machines to be transmitted simultaneously over a single wire

A

1874

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22
Q

invented a telegraph multiplexer which allowed signals up to six different telegraph
machines to be transmitted simultaneously over a single wire

A

Emile Baudot

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23
Q

Alexander Graham Bell invented the telephone

A

1876

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24
Q

invented the telephone

A

Alexander Graham Bell

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25
Q

Guglielmo Marconi succeeded in sending radio telegraph messages

A

1899

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26
Q

succeeded in sending radio telegraph messages

A

Guglielmo Marconi

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27
Q

First commercial radio stations were installed, allowing the transmission of information across large
spans of water.

A

1920

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28
Q

Bell Laboratories developed the first special-purpose computer using eletromechanical relay

A

1940

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29
Q

developed the first special-purpose computer using eletromechanical relay

A

Bell Laboratories

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30
Q

The UNIVAC was the first mass produced electronic computer, built by the Remington Rand
Corporation
8ENGR. JUZ

A

1951

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31
Q

was the first mass produced electronic computer

A

UNIVAC

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32
Q

built UNIVAC

A

Remington Rand Corporation

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33
Q

batch processing systems were replaced by on-line processing systems

A

1960s

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34
Q

microprocessor-controlled microcomputers were introduced

A

1970s

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35
Q

Personal computers became an
essential item

A

1980s

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36
Q

The AT&T operating tariff allowed only equipment furnished by AT&T to be connected to AT&T lines.

37
Q

Internet began to evolve at the ARPA

38
Q

ARPANET was formed to connect sites around the US

39
Q

was formed to connect sites around the US

40
Q

The World Wide Web became publicly available

41
Q

3 major developments:

A
  1. Large-scale integration of circuits reduced cost and size of terminals and communication equipment
  2. New software systems that facilitated the development of data communication networks
  3. Competition among providers of transmission facilities reduced the cost of data circuits
42
Q
  1. When we communicate , we share information
  2. Information can be LOCAL or REMOTE
  3. Between Individuals LOCAL communication occurs face to face
  4. REMOTE communication occurs over a long distance
  5. When we refer to COMPUTER SYSTEMS, Data is represented in the form of
  6. Binary Units (Bits) in the form of Zeros (0’s) and One’s (1’s)
  7. Also the entities can most of the times be considered to be COMPUTERS
A

DATA COMMUNICATION

43
Q

is the exchange of data (in the form of 0’s and 1’s) between two devices
(computers) via some form of the transmission medium.”
14ENGR. JUZ
Data Communication Definition (Modified)

A

DATA COMMUNICATION

44
Q

is any system of computers used to transmit and/or receive information between two or more
locations

A

Data Communication Network

45
Q

is a set of equipment, transmission media, and procedures that ensures that a specific sequence of
events occurs in a network in the proper order to produce the intended results

A

Network Architecture

46
Q

give the users of the network the tools necessary for setting up the network and performing data flow control.

A

Network Architecture

47
Q

three General Classifications of Network and Network Protocols

A
  1. Current Networks
  2. Legacy Networks
  3. Legendary Networks
48
Q

include the most modern and sophisticated networks and protocols available

A

Current Networks

49
Q

A network or a protocol becomes a legacy when no one really wants to use it, but for some reason it
just won’t go away. It is the generic name assigned to any old network, which is rarely used today and not part
of the TCP/IP protocol suite.

A

Legacy networks

50
Q

are mostly proprietary to individual vendors

A

Legacy networks

51
Q

when an antiquated network or protocol finally disappears, it becomes legendary

A

Legendary Networks

52
Q

All stations and devices on the network share a single communication channel

A

Broadcast Network

53
Q

It only has two stations. No addresses are needed. All transmissions from one station are
Intended for and received by the other station.

A

Point-to-point Network

54
Q

Computer Networks can be classified in two different ways

A

Broadcast Network and Point-to-point Network

55
Q

Data Communication Protocols

A
  1. Protocols
  2. Data Communication Protocols
  3. Syntax
  4. Semantics
56
Q

are set if customs, rules, regulations dealing with formality or precedence, such as diplomatic
protocol or military protocol

57
Q

are sets of rules governing the orderly exchange of data within the network or a portion of the
network. Can either be Connection Oriented or Connectionless

A

Data Communication Protocols

58
Q

refers to the structure or format of the data within the message, which includes sequence in which
the data are sent.

59
Q

refers to the meaning of each section of data

60
Q

are guidelines that have been generally accepted by the data communication industry. (Proprietary
or Open)

A

Data Communications Standards

61
Q

Data communications networks can be generally categorized as either

A

two-point or multipoint

62
Q

involves the transfer of digital information between a mainframe computer and a
personal computer, two mainframe computers, two personal computers, or two data communications
networks

A

two-point circuit

63
Q

is generally used to interconnect a single mainframe computer (host) to many
personal computers or to interconnect many personal computers.

A

multipoint network

64
Q

is generally used for short-distance data communications and within a computer

A

Parallel transmission

65
Q

is generally used for long-distance data communications

A

serial transmission

66
Q

four modes of transmission for data communications circuits

A
  • Simplex
  • Half Duplex
  • Full Duplex
  • Full/Full Duplex
67
Q

data transmission is unidirectional; information can be sent in only one
direction.

A

simplex (SX) mode

68
Q

data transmission
is possible in both directions but not at the same
time.

A

half-duplex (HDX) mode

69
Q

transmissions are
possible in both directions simultaneously, but they
must be between the same two stations.

A

full-duplex (FDX) mode

70
Q

transmission
is possible in both directions at the same time but
not between the same two stations (i.e., one station
is transmitting to a second station and receiving
from a third station at the same time).

A

full/full duplex (F/FDX) mode

71
Q

is full-duplex type of transmission that sends data in the form of blocks or
frames.

A

Synchronous Transmission

72
Q

There is no time gap present between data since both the sender and receiver are synchronized with a
common clock signal. This means they operate at the same speed and know exactly when to send and
receive data.

A

Synchronous Transmission

73
Q

Data is sent in a continuous stream, with each byte or chunk of data following the previous one without
any gaps. It’s efficient for sending large amounts of data quickly because there’s less overhead (extra bits)
needed to start and stop the transmission.

A

Synchronous Transmission

74
Q

is half-duplex type of transmission that sends data in the form of byte or
character.

A

Asynchronous Transmission

75
Q

The sender and receiver do not share a common clock signal. Instead, data is sent one byte or character at
a time, with start and stop bits indicating the beginning and end of each byte. Each piece of data is sent
independently, with gaps in between, allowing the receiver to process each byte as it arrives.

A

Asynchronous Transmission

76
Q

It’s flexible and simpler to implement, especially useful for communications where data is sent
intermittently

A

Asynchronous Transmission

77
Q

are sets of rules governing the orderly exchange of data within the network or a
portion of the network

A

Data communications protocols

78
Q

can be generally classified as either connection oriented or connectionless.

79
Q

establishes a logical connection between the endpoints prior to the transmission
of data and are designed to provide a high degree of reliability for data moving through the network

A

connection-oriented protocol

80
Q

are protocols where data are exchanged in an unplanned fashion without prior coordination between endpoints and do not provide the same high degree of reliability as connection-oriented protocols; however, connectionless protocols offer a significant advantage in transmission speed.

A

Connectionless protocols

81
Q

2 categories of transmission medium

A

Wired
- Wireless

82
Q

a physical link is created using wires or cables between two or more computers
or devices, and then the data is transmitted using these cables in terms of signals.

A

Wired Communication

83
Q

wired communication types

A

Twisted pair cable
- Unshielded twisted pair (UTP)
- Shielded twisted pair (STP)
- Coaxial cable
- Optical fibers

84
Q

signals are propagated from one device to another device wirelessly. Signals
can wave through the air, water, or vacuum. It is generally used to transmit signals in all directions.

A

Wireless Communication

85
Q

wireless communication types

A

-Microwave
- Radio wave
- Infrared

86
Q

Also known as communication mode

A

Transmission Mode

87
Q

A method of transmitting data using infrared light waves , typically over short distances. It is commonly used in remote controls, short range data transfer, and some wireless communication systems

88
Q

A technology that transmits data using high frequency radio waves and it commonly used for satellite communications, mobile networks, radar systems, and point to point communication links over long distances

COMMS 3 (6 decks)

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