Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

NE > ch.8 > Flashcards

ch.8 Flashcards

1
Q

communication

A

process of sending and receiving messages electronically between two point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

sending device

A

initiate the transmission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

receiving device

A

accept the transmission and respond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

communication channel

A

path of send and receive messages

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

analog signal

A

continuous waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

digital signal

A

discontinuous , discrete pulses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

convertor

A

translate signal
analog signal to digital signal converter
digital signal to analog signal converter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

bandwidth

A

the maximum amount of data transmitted through communication channel at one time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

throughput

A

actual amount of data transmitted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

broadband

A

any transmission medium that carry several channel transporting data at high speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

streaming

A

ability to hear and see content that has been download from website

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

modem

A

communication device used to send and receive data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

modulation

A

sender uses modulation to transmit signal digital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

demodulation

A

receiver uses demodulation to return signal to digital form

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

type of modem

A

1- analog
2- digital subscriber line (DSL)
3- cable
4- integrated service digital network (ISDN)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

data transfer rate

A
  • rate at which two modems exchange data
  • measure in bits per second (bps)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

buad

A

number of signaling element per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

wiring closet

A

house wiring support most type of data transfer needed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

twisted pair wire

A

1- copper wire for telephone and data communication
2- two pairs of interwave wire twisted together
3- inexpensive, bandwidth very low for video, voice and data at one time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

key variation of twisted wire pair

A

1- category 5 (cat-5)
2- category 5 enhanced (cat-5e)
3- category 6 (cat-6)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

coaxial cable

A

consist of copper wire surrounded by insolation and braided wire
- broadband communication
- cable TV
- 10 Mbps transfer rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

fiber optic cable

A

consist of thin strands of plastic or glass that carry data through pulses of light
- broadband communication
- 10 Gbps transfer rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Single fiber optic strands is composed of three parts:

A

1- core: thin plastic of glass center through light travel
2- cladding: optical material surrounding core that reflect the light back to core
3- buffer coat: plastic coating protect fiber form damage

24
Q

infrared

A

1- wireless transmission medium carry data through air using light beams
2- send and receive device must be in line sight
3- use irda port to enable data transfer

25
Q

radio transmission

A

1- enable voice, photo and music travel through air as radio frequency or radio waves
2- do not require direct line or sight

26
Q

bluetooth

A

radio transmission enable within 30 feet device communicate wirelessly

27
Q

satellite

A

microwave station in space transmit data through microwave signals

28
Q

Direct broadcast satellite (DBS)

A

consumer satellite technology that receives digital TV signals through a reception dish

29
Q

network access point

A

Requires the computer system to have a special communications device to sends and receives data between computer that contain wireless adapters

30
Q

Public switched telephone network (PSTN)

A
  • Global telephone system, a massive network used for data as well as voice communications
  • Comprising various transmission media ranging from twisted-pair wire to fiber-optic cable
31
Q

Subscriber loop carrier (SLC)

A

1- Small, waist-high curbside installation that connects as many subscribers
2- Links home and business telephones
3- Accommodates analog devices

32
Q

local loop

A

1- Is the area served by an SLC
2- SLC, the digital signals are routed via high-capacity fiber-optic cables to the local exchange switch
3- digital device capable of handling thousands of calls located in the local telephone company’s central office (CO)

33
Q

Digital telephony

A

1- Telephones and transmissions are digital.
2- companies and universities install their own internal digital telephone
systems, called private branch exchanges(PBXs).

34
Q

Multiplexing

A

1- Allows multiple calls over a single line.
2- Long-distance carriers transmit many calls in digital format in a single circuit.

35
Q

Last-mile technologies

A

1- Provide solutions for bottlenecks that result from the inability of users to access the PSTN’s high-speed fiber-optic cables
2- Used while local loops are upgraded

36
Q

Last-mile technologies

A

Technologies that help bridge that gap, last-mile technologies, include digital telephone standards (such as ISDN and DSL) that use twisted-pair wiring, as well as high-speed wired services (such as coaxial cable and cable modems).

37
Q

Integrated services digital networking (ISDN)

A

1- Standard that provides digital telephone and data service
2- No lengthy dial-in procedures or connection delay
3- Requires an ISDN adapter/digital modem to connect computers to ISDN lines
4- May be the only broadband solution in rural areas

38
Q

Digital subscriber line (DSL)

A

1- Broad term for a group of technologies that offer high-speed access to the Internet
2- Requires a DSL modem to modulate and demodulate analog and digital signals
3- More expensive than dial-up but cheaper than other broadband options

39
Q

Cable-based broadband

A

1- Provides Internet access through cable TV connections
2- Uses cable modems to obtain higher speeds than DSL

40
Q

Leased lines

A

1- Sometimes called a dedicated line, is a connection set up by a telecommunication carrier and is usually a permanent fiber-optic or telephone connection
2- Enables continuous, end-to-end communication between two points
3- Larger organizations, such as ISPs, corporations, and universities, connect using leased T1 lines, which are fiber-optic

41
Q

Other Last-Mile Technologies

A

1- Fiber-optic T2 and T3 lines can handle up to 44.7 Mbps of computer data
2- SONET (synchronous optical network): is a physical layer of network technology that uses 1- fiber-optic cable and is designed to carry large volumes of data over long distances
3- MMDS (Multichannel multipoint distribution service): sometimes called multi point microwave distribution system) is microwave technology that was originally slated as a wireless alternative to cable television, but now its main application is Internet access
4- WiMax (Worldwide interoperability for microwave access): is a wireless up-and-coming digital communication system designed to deliver high-speed access over long distances

42
Q

Digitization

A

Process of transforming data into a digital form

43
Q

Convergence

A

1- Blending
2- Multiple industries
Examples: Computers, consumer electronics, telecommunications
3- Products
Examples: Personal computers, telephones

44
Q

Cellular telephones

A

1- Digital transmission of voice, text, images, and video
2- Classified by generations—4G (fourth generation)—the current generation
3- Cell sites—network of transmitters broadcasts signals throughout geographic areas called cells

45
Q

mobile switching centers (MSCs)

A

include in each cellular network that control communication within a set of cells.

46
Q

Personal communication service (PCS)

A

1- Group of digital cellular technologies replacing most analog cellular services
2- 2G (second generation)—used to make smartphones, with features of phones and computing devices
3- 3G—more data and voice customers and higher data transfer rates
4- 4G—improved connectivity, data transfer rates, and support for the next generation of multimedia

47
Q

Web-enabled devices

A

1- Display and respond to markup languages
Examples: HTML, XML—used to build Web,pages,
PDAs ,Smartphones—replacing PDAs,Notebooks

48
Q

WAP (Wireless Application Protocol)

A

1- Standard—specifies how users can access the Web securely using:
Pagers
Smartphones
PDAs
Other wireless devices
2- Requires a microbrowser

49
Q

Internet telephony, or VoIP (Voice over Internet Protocol)

A

1- Offers computer-to-phone and phone-to-phone transmission through the Internet
2- Placing calls requires:
Computer with a microphone, speakers or headphones
Internet connection
Telephony-enabled program

50
Q

Internet telephony

A

1- Videoconferencing (Web conferencing)—transmits sound and video images using:
Video camera (Webcams)
Skype software
2- Whiteboards—enable participants to create a shared workspace
3- Webcams—inexpensive, low-resolution analog or digital video cameras
4- Internet TV—ability to view television shows, videos, and movies over the Internet

51
Q

Facsimile transmission (fax)

A

1- Transmits documents over a telephone line or the Internet using either:
Standalone fax machine
Computer with a fax modem and a scanner

52
Q

Satellite radio

A

1- Satellite radio:
Not affected by location, distance, or obstructions
Uses satellites orbiting the Earth
Permits usage in areas with restricted local radio stations or poor AM/FM reception
2- GPS (Global Positioning System) :
System of 27 satellites allowing a receiver to pinpoint locations
Mobile units for cars
Installed car systems

53
Q

Text messaging (SMS)

A

1- Using cell phone for applications previously used on computers
2- Instant messaging
3- Brief e-mail

54
Q

Picture messaging

A

1- MMS (multimedia messaging system)
2- Transmits color pictures and backgrounds
3- Cellular telephone acts as a camera

55
Q

Location awareness

A

1- Also known as position awareness
2- Uses GPS-enabled chips to pinpoint the location of a cell phone
3- Popular with parents of teenagers

56
Q
A

NE (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions