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CSS 3003 > Chap 10 > Flashcards

Chap 10 Flashcards

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1
Q

Numerous applications depend on communication
systems, including

A

– Texting.
– E-mail.
– Videoconferencing

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2
Q

Wireless Connections

A

Wireless connections do not use a solid substance to
connect; uses the air itself. Most use radio waves to
communicate

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3
Q

Cellular radio

A

Use multiple antennae to
communication
a form of broadcast radio that is in wide use for mobile
communications

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4
Q

Bluetooth (short-range).

A

Radio communication
standard.

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5
Q

Broadcast radio

A

a wireless transmission medium that distributes
radio signals through the air over long distances

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6
Q

Wi-Fi (wireless fidelity)

A

Uses high frequency radio

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7
Q

Microwave.

A

Uses high frequency radio
wave signals.

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8
Q

WiMax (extends Wi-Fi)

A

New standard that uses microwave
to extend WiFi.

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9
Q

Satellite.

A

Uses satellites as microwave relay
stations.
a space station that receives microwave signals from an earth-based station, amplifies it, and broadcasts the signal over a wide area to any number of earth-based stations

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10
Q

GPS.

A

Determine geographic location of
the devices.

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11
Q

Infrared

A

Use infrared light wants to
communication over short
distances.

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12
Q

Physical Connections

A

Telephone lines.
* Ethernet cables.
Coaxial cable: single solid copper core.
* Cable TV.
Fiber-optic cable: tiny glass tubes.
* Faster and more reliable than coax.
* Speeds as high as 1 petabit per second.

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13
Q

Types of signals

A

Analog (telephone).
* Digital (computer)

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14
Q

Transfer rates

A
  • Mbps – million bits per second.
  • Gbps – billion bits per second.
  • Tbps – trillion bits per second.
  • Speed in which modems transfer data.
  • Usually measured in megabits per second (Mbps).
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15
Q

Modem

A

modulator-demodulator.
* Modulation is the process of converting from digital to analog.
* Demodulation is the process of converting from analog to digital.

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16
Q

Types of Modems

A

Digital subscriber line (DSL).
* High speed telephone lines.
Cable.
* Uses coaxial cable.
Wireless.
* Also known as WWAN

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17
Q

Fourth Generation 4G

A

increased
speed, streaming video and music.

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18
Q

Fifth Generation 5G,

A

speeds approaching those of a home
Internet connection

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19
Q

Digital subscriber line (DSL)

A
  • Uses phone lines.
  • ADSL is most widely used
    type of DSL.
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20
Q

Fiber Optic Service (FiOS)

A

New technology.
* Google and Verizon

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21
Q

Cable.

A
  • Uses existing TV cable.
  • Faster than DSL
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22
Q

Satellite connection
services.

A

Use almost anywhere.

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23
Q

A network

A

a collection of computers and devices
connected together via communications devices and
transmission media

24
Q

Advantages of a network include:

A

Facilitating communications
– Sharing hardware
– Sharing data and information
– Sharing software
– Transferring funds

25
Q

A local area network (LAN)

A

a network that
connects computers and devices in a limited
geographical area

26
Q

wireless LAN (WLAN)

A

a LAN that uses no physical wires

27
Q

A metropolitan area network (MAN)

A

connects LANs in a metropolitan area

28
Q

wide area network (WAN)

A

a network that covers a large geographic area

29
Q

personal area network (PAN)

A

a network that connects computers and devices in an individual’s workspace using wired and wireless technology

30
Q

network architecture

A

Network Topology.
– Physical arrangement of the network.
* Network Strategy.
– How the information and resources are shared

31
Q

Client/Server Network.

A
  • Central computers
    coordinate and supply
    services to other nodes
    on the network.
  • Server provides access
32
Q

Types of Network

A

Ring
Star
Tree
Mesh

33
Q

Peer-to-Peer (P2P) Network

A
  • All nodes have equal authority.
  • Can act as both client and server.
34
Q

Communications software

A

Help users establish a connection to another computer, mobile device, or network
– Manage the transmission of data, instructions, and
information
– Provide an interface for users to communicate with one another

35
Q

Ethernet

A

network standard that specifies no
central computer or device on the network (nodes)
should control when data can be transmitted

36
Q

token ring

A

standard specifies that computers and
devices on the network share or pass a special signal
(token)

37
Q

TCP/IP

A

a network protocol that defines how messages (data) are routed from one end of a network
to another

38
Q

LTE

A

network standard that defines how high-speed cellular
transmissions use broadcast radio to transmit data for mobile communications

39
Q

Bluetooth

A

network protocol that defines how two Bluetooth devices use short-range radio waves to transmit data

40
Q

UWB (ultra-wideband)

A

network standard that specifies how two
UWB devices use short-range radio waves to communicate at high speeds with each other

41
Q

IrDA

A

transmits data wirelessly via infrared (IR) light waves

42
Q

RFID

A

a protocol that defines how a network uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person

43
Q

NFC (near field communication)

A

a protocol, based on RFID, that defines
how a network uses close-range radio signals to communicate between two devices or objects equipped with NFC technology

44
Q

A broadband modem

A

sends and receives data and
information to and from a digital line
– Cable modem
– DSL modem

45
Q

A wireless access point (WAP)

A

a central communications device that
allows computers and devices to transfer data wirelessly among themselves or to a wired network

46
Q

routers provide additional functionality:

A

– Wireless router
– Broadband router
– Broadband wireless
router
– Mobile broadband
wireless router

47
Q

A network card

A

enables a computer or device that does
not have built-in networking capability to access a
network

48
Q

Intranet.

A
  • Private network within an organization.
  • Works like the Internet.
49
Q

Extranet.

A

Private network that connects more than one organization.
* Works like the Internet, but provides suppliers and other
trusted partners with limited access to the organization’s
networks.

50
Q

Firewall.

A

Hardware and software that controls access to network.
* Proxy server provides pass-through access.
* Protects against external threats.

51
Q

Intrusion detection system (IDS).

A

Works with firewall to protect organization’s network.
* Analyzes all incoming and outgoing network traffic.

52
Q

Virtual private network (VPN).

A
  • Creates a secure private network connection between your computer
    and the organization.
53
Q

Broadband media

A

transmit multiple signals simultaneously

54
Q

bandwidth

A

The amount of data, instructions, and information that
can travel over transmission media

55
Q

Latency

A

time it takes a signal to travel from one
location to another on a network

56
Q
A

CSS 3003 (9 decks)

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