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Engineering Utilities 1 - Lesson 7 > 1st Part > Flashcards

1st Part Flashcards

1
Q

the electronic transmission of information over distances that
has become virtually inseparable from computer; the information may be in the form of voice telephone calls, data, text, images, or video; today these are used to organize more or less remote computer systems into telecommunications networks run by computers

A

telecommunications

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2
Q

true or false:

computers and telecommunications create value together

A

true

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3
Q

it is an arrangement of computing and telecommunications resources for communication of information between distant locations

A

telecommunications network

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4
Q

components of telecommunications network:

access the network

A

terminals

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5
Q

components of telecommunications network:

process information and are interconnected by the
network

A

computers

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6
Q

components of telecommunications network:

form a channel through which information is transmitted from a sending device to a receiving device

A

telecommunications links

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7
Q

components of telecommunications network:

facilitates the transmission of information

A

telecommunications equipment

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8
Q

components of telecommunications network:

controls message transmission over the network

A

telecommunications software

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9
Q

what are the two principal types of telecommunications networks?

A
  • local area networks
  • wide area networks
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10
Q

the two principal types of telecommunications networks can be distinguished from the point of view of their _____

A

geographical scope

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11
Q

principal types of telecommunications networks:

it is a privately owned network that interconnects processors, usually microcomputers, within a building or on a campus site that includes several buildings

A

local area network (LAN)

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12
Q

characterized as the:

  • the principal tool of workgroup computing
  • ensure high-speed communication within a limited area and
    enables the users to share facilities (peripherals) connected to it
  • usually include a large-capacity, secondary storage device, where database and applications software are maintained, managed by a microcomputer acting as a file server that delivers data or program files to other computers
  • facilities (peripherals) may include jukebox optical memory and fast printers
  • includes gateway hardware and software that give the network users access to other networks
  • more group members may connect to the network from remote sites using wireless telecommunications
  • includes links and equipment owned by the user company, and these networks are generally much faster than WANs
  • generally composed of a network of microcomputers
A

local area network (LAN)

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13
Q

principal types of telecommunications networks:

it is a telecommunications network that covers a large geographical area

A

wide area network (WAN)

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14
Q

characterized as the:

  • the information system of an entire organization may be structured as a hierarchy
  • the system architecture looks very much like an
    organization chart
  • connects all the divisional minicomputers to the headquarters
    mainframe with a variety of local microcomputers and terminals located at remote sites connected, in turn, to the minicomputers
  • provides the backbone through which all other nodes (computers and terminals) communicate.
  • often use telecommunication links and equipment provided by
    specialized vendors, called common carriers
  • serves to interconnect multiple LANs and can make specific
    resources available to a large number of workstations
A

wide area network (WAN)

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15
Q

types of telecommunications networks:

these are telecommunications networks that interconnect
various local area networks within a metropolitan area, that is,
within approximately a 50-mile range

A

metropolitan area networks (MAN)

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16
Q

characterized as the:

  • interconnect various LANs within a metropolitan
    area, that is, within approximately a 50 - mile range
  • the speed is equal to that of LANs and they use similar technology
A

metropolitan area networks (MAN)

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17
Q

characterized as the:

  • help several firms share information in order to coordinate their work, collaborate on common projects, or sell and buy
    products and services
  • internet has emerged as a global public network of networks
  • employed in knowledge work
  • can be used to connect a firm’s computers to the information systems of its customers, suppliers, and business partners, and are also used to execute business transactions
A

interorganizational information systems

18
Q

may be implemented with various communication media, with a corresponding variety of characteristics

A

telecommunications links

19
Q

it is the main feature of a medium, referring to its potential
transmission speed, which for data transmission purposes
is expressed in bits per second (bps)

A

channel capacity

20
Q

an alternative measure of transmission channel
capacity; the range of signal frequencies that can be transmitted over the channel

A

bandwidth

21
Q

six potential media are employed to implement telecommunication links

A
  • twisted pair
  • coaxial cable
  • fiber optics cable
  • terrestrial microwave
  • satellite transmission
  • radio transmission
22
Q

classification of transmission media:

the signal moves along an enclosed path and requires wiring; includes twisted pair, coaxial cable, and fiber optic cable

A

guided media

23
Q

classification of transmission media:

the signal is broadcast (radiated in many directions) over the air or space and received through an antenna; includes terrestrial microwave, satellite transmission, and radio transmission

A

wireless media

24
Q

characteristics of communications media:

a communications medium consisting of a pair of wires

A

twisted pair

25
Q

characteristics of communications media:

a communications medium that consists of a relatively thick central conductor shielded by several layers of insulation and the second conductor just under the cable’s shell

A

coaxial cable

26
Q

characteristics of communications media:

high-capacity communications medium that consists of many strands of pure glass with a data carrying core in the middle, surrounded by a reflective coating and a protective sheath

A

fiber optics

27
Q

characteristics of communications media:

long-distance telecommunications by means of microwave signals travelling on the surface of the earth

A

terrestrial microwave

28
Q

characteristics of communications media:

form of microwave transmission in which the signal is transmitted by an earth station to a satellite which rebroadcasts the signal to the receiving station

A

satellite transmission

29
Q

characteristics of communications media:

wireless communications technology that transmits voice or data over the air using a lower frequency band than microwaves

A

radio transmission

30
Q

due to digital transmission or multimedia environment, data, text, voice, images, and video will travel at speeds of _____

A

billions of bits per second

31
Q

most of the lines in the telephone systems of the world at
present are _____; signals are transmitted as _____

A

analog; continuous waves

31
Q

most of the lines in the telephone systems of the world at
present are _____; signals are transmitted as _____

A

analog; continuous waves

32
Q

a pair of interface devices that converts data from digital
form into analog for transmission and then back into digital at
the receiving end

A

modems (modulator-demodulator)

33
Q

have created a significant bottleneck in an environment where computer and peripheral speeds have increased dramatically

A

modem-based telecommunications

34
Q

there is a shift toward digital telecommunications is taking place
throughout the world; a digital system for telecommunications, called _____ is in wide use in parts of the telephone network

A

TI carrier

34
Q

there is a shift toward digital telecommunications is taking place
throughout the world; a digital system for telecommunications, called _____ is in wide use in parts of the telephone network

A

TI carrier

35
Q

a completely digital telecommunications network standardized by an international committee

A

Integrated Services Digital Network (ISDN)

36
Q

what are the two principal methods of reducing the costs of telecommunications?

A
  • multiplexing
  • signal compression
37
Q

two principal methods of reducing telecommunication costs:

defined as the sharing of a high-capacity link by a number of
transmissions
2. Signal Compression - using the link more efficiently by removing
redundancies from the signal.

A

multiplexing

38
Q

two principal methods of reducing telecommunication costs:

used the link more efficiently by removing redundancies from the signal

A

signal compression

39
Q

characterized as the:

  • there are economies of scale in telecommunications systems: the higher the system capacity, the lower the unit cost of transmissions
  • many individual transmissions can share a physical channel through a variety of techniques collectively
  • combines several lower-capacity transmissions into a
    single transmission, which is split at the receiving end
A

multiplexing

40
Q

characterized as the:

  • the reduction of the need for channel capacity by removing redundancies from the signa
  • reduction of the transmission needs, we can remove the redundancies at the sender site, transmit the compressed signal, and then restore the signal at the receiving end
  • has an impressive effect on multimedia transmission needs
A

signal compression

Engineering Utilities 1 - Lesson 7 (2 decks)

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