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CSci 11 > Communication Networks I > Flashcards

Communication Networks I Flashcards

1
Q

process of sharing data, programs and information between two or more computers

A

communications

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2
Q

concept related to using computer networks to link people and resources

A

connectivity

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3
Q

widespread use of mobile devices with wireless internet connectivity

A

wireless revolution

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4
Q

allows individuals to stay connected with one another from almost anywhere at any time

A

wireless technology

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5
Q

electronic systems that transmit data from one location to another

A

communication systems

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6
Q

basic elements of a communication system (4)

A
  1. Sending and receiving devices.
  2. Connection devices
  3. Data transmission specifications
  4. Communication channel
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7
Q

these are often a computer or specialized communication device

A

sending and receiving devices

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8
Q

these devices act as an interface between the sending and receving devices and the communication channel

A

connection devices

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9
Q

these are rules and procedures that coordinate the sending and receiving devices by precisely defining how the message will be sent across the communication channel

A

data transmission specifications

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10
Q

the actual connecting or transmission medium that carries the message and these channels actually carry the data from one computer to another

A

communication channels

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11
Q

2 categories of communication channels

A

wired and wireless

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12
Q

uses a solid medium to connect sending and receiving devices

A

physical connections

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13
Q

physical connections include:

A

a. twisted-pair cable
b. coaxial cable
c. fiber-optic cable

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14
Q

consists of pairs of copper wire that are twisted together

A

twisted-pair cable

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15
Q

high-frequency transmission cable, replaces the multiple wires of telephone lines with a single solid-copper core that has over 80 times the transmission capacity of twister pair

A

coaxial cable

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16
Q

used to deliver television signals and to connect computers in a network

A

coaxial cable

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17
Q

are used by telephone lines and ethernet cables

A

twisted-pair cable

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18
Q

transmit data as pulses of light through tiny tubes of glass

A

fiber-optic cable

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19
Q

fiber-optic cable is capable of sending/receiving a speed of

A

1 petabit per second (1 million gigabits)

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20
Q

lighter, faster, and more reliable at transmitting data which is rapidly replacing twisted-pair cable telephone lines

A

fiber-optic cable

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21
Q

move data through the air by using radio waves

A

wireless connections

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22
Q

technologies used for wireless connections

A

bluetooth, Wi-Fi, microwave, WiMax, cellular, satellite connections

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23
Q

short-range radio communication standard that transmits data over short distances of up to approximately 33 feet

A

bluetooth

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24
Q

widely used for wireless headsets, printer connections, and handheld device

A

bluetooth

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25
Q

uses high-frequency radio signals to transmit data

A

Wi-Fi (wireless fidelity)

26
Q

uses high-frequency radio waves which is sometimes referred to as line-of-sight communication as it only travels in a straight line

A

microwave

27
Q

transmitted only over relatively short distance in a straight line

A

microwave

28
Q

microwave dishes or antennas will be used for _______________ connections

A

long distance connection

29
Q

WiMax is known as

A

Worldwide Interoperability for Microwave Access

30
Q

a new standard that extends the range of Wi-Fi networks using microwave connections

A

WiMax

31
Q

commonly used by universities and others to extend the capability of existing Wi-Fi networks

A

WiMax

32
Q

uses multiple antennae (cell towers) to send and receive data within relatively small geographic regions (cells)

A

cellular

33
Q

uses satellites orbiting about 22,000 miles above the earth as microwave relay stations

A

satellite

34
Q

most satellites are offered by IntelSat which is known as

A

International Telecommunication Satellites Consortium

35
Q

used to send and receive large volumes of data

A

satellite

36
Q

term relating to sending data to a satellite

A

uplink

37
Q

receiving data from a satellite

A

downlink

38
Q

network of satellites owned and managed by the Department of Defense continuously sends location information to earth

A

Application: Global Positioning

39
Q

device that use the information to uniquely determine the geographic location of the device

A

Global Positioning System (GPS)

40
Q

uses infrared light waves to communicate over short distances

A

infrared

41
Q

tv remote control is an example of

A

infrared

42
Q

continuous electronic waves

A

analog

43
Q

presence or absence of an electronic pulse - the on/off binary signals

A

digital

44
Q

modem is also known as

A

modulator - demodulator

45
Q

process of convertign digital into analog signal

A

modulation

46
Q

process of converting analog into digital signal

A

demodulation

47
Q

it enables digital personal computers to communicate across the different media, including telephone wires, cable lines, and radio waves

A

modems

48
Q

transfer rate of modems is measured in

A

megabits per second (Mbps)

49
Q

uses standard phone lines to create a high-speed connection directly to your phone company’s offices

A

digital subscriber line (DSL)

50
Q

uses the same coaxial cable as your television that creates high-speed connections using the system unit’s USB or ethernet port

A

cable modem

51
Q

WWAN is known as

A

Wireless Wide Area Network (Wireless Modem)

52
Q

connection services include

A
  1. Dial-up Services
  2. Digital Subscriber Line (DSL) Service
  3. Cable Service
  4. Fiber - Optic Service (FiOS)
  5. Satellite Connection Services
  6. Cellular Service Providers
53
Q

uses existing telephones and telephone

A

dial-up services

54
Q

modems to connect to the internet

A

dial-up services

55
Q

provided by telephone companies using existing telephone lines to provide high-speed connections and it is much faster than dial-up

A

digital subscriber line (DSL) service

56
Q

provided by cable television companies using their existing television cables

A

cable service

57
Q

showing up in some areas, but it is a new technology that provide speeds faster than cable or DSL connections

A

fiber-optic service (FiOS)

58
Q

uses satellites to provide wireless connections

A

satellite connection services

59
Q

satellite connection services is slower than DSL and cable modem

A

true

60
Q

support voice and data transmission to wireless devices using cellular networks

A

cellular service providers

CSci 11 (11 decks)

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