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internet Flashcards

1
Q

define the internet .

A

widespread information and communication infrastructure.

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2
Q

what is commercialisation?

A

computer technology, network strucure,vendors and service providers offer products to connect with influx of networks growing webpages offering products or services.

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3
Q

what defines web 1.0

A

it is the “consumers of content”
users able to view webpages couldnt contribute content , remove or change
Web page developer and web master controlled content of webpages and kept it up to date
there were fewers slwo internet connections and HTML pages with hyperlinks.

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4
Q

what defines Web 2.0

A

users could interact and communicate with other by creating and using user generated sites, social , networking and blogs.
better user interface software and browser storage
users could make changes to pages
webpages to link to othres
effiecient ways to share content
users receive notifications
greater sharing, faster internet connections and social media applications.

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5
Q

define web 3.0

A

more personalised internet experience
each have unique internet profile based on specific browsing history
E-commerce/advertising according to user taste

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6
Q

define web 4.0

A

mobile web that adpts to its mobile surroundings
connects all devices in real and virtual world in real-time.
redegines the relations ship between human and machine.

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7
Q

what is scripting?

A

access webpage from client and send URL to web server and return corrresponding page in format of HTML document interpreted by web browser app

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8
Q

what is a script?

A

set of instructions either to web browers or server.

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9
Q

what is a client

A

the system the web browser runs on

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10
Q

what is Java Script used for

A

main client side scripting language for web.

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11
Q

what is the process for client side scripting?

A

user requests wevpage from server
server find page and sends to user
page displayed on browser with scripts run during or after the display

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12
Q

what is a server?

A

where webpages and other content lives

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13
Q

what is the process of server side scripting?

A

user request webpage from server
script is interpreted by server therfore creates or changes content to suit user and oaccasion or passes ata around
final form of page sent to user

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14
Q

how would a combination of serverside and client side scripting work?

A

the server-side handles logging in, personal information,provide specific data user wants and allows new data stored and client side interactive pages, displays or sorts data in different ways as required by user

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15
Q

what are cookies

A

small pieces of data sent from website stored in web browser whilst browsing site. and if you visit the same site in futer data stored is retrieved to notify site of prevous activity

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16
Q

what is a web- based application?

A

software installed and run on remoter server accessed with web browser that need internet and browser to function

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17
Q

what are the advantages of web based apps?

A

dont need to purchase /install software
accessed from anywhere and any kind of system
accessible at any time of day
not limited by OS computer system uses
kept up to date because software runs remotely

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18
Q

what is a mobile website?

A

a web based application runs on mobile device

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19
Q

define responsive web

A

design philosophy and technique set adresses issue of creating positive user experiences

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20
Q

what is responsive web design?

A

wevsite appear to be designed for each device and browser

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21
Q

explain what a native mobile app is

A

written using native development language/tools specific to device platform it often performs better because code is designed for device

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22
Q

what is the draw back of a native mobile app?

A

they are costly,time consuming adhere to respective rules and regualtions, upgraded for both stores and limited to capabilties of mobile browser.

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23
Q

what is a Hybrid mobile App?

A

a blend of bative and websolutions the core written using cross platform web technologies encapsulated inside native app

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24
Q

what do design factors for mobile technology take into account?

A 
screens 
processing demands 
storage demands
bandwidth requirements 
plug-ins and extensions
search engines
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25
Q

what has to be considered when designing a screen?

A

size
sensitivity to tough
resolution quality

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26
Q

what has to be considered when designing processing demands?

A

imporvements in processing power and consider average processing specificaitions of smartphone processors when devloping applications

27
Q

what has to be considered when deciding on processing demands of mobile technology?

A

limited storage as paps must be efficient in terms of storage.

28
Q

what has to be considered in terms of bandwidth requirements for mobile technology?

A

consider requirements lactioins based services or bandwidth intensive features.

29
Q

what is a plug-in?

A

software module adds special feature to existing compuetr program to customise program

30
Q

what is an extension?

A

small software module provides customisation for browser

31
Q

how do search engines work?

A

search web for specified keywors and returns list of pages that match search criteria

32
Q

what is a search request?

A

when search engine matches user request to data in database and return ranked list

33
Q

explain search for sound.

A

applications aid searching are popular and provide specific search

34
Q

explain reverse image lookup

A

allows user to search for rellated images by uploading image or image URL

35
Q

how does reverse image lookup work

A

it analyses image by construction mathmatical model using advance algorithms and it creates a fingerprint that descrive image uniquely

36
Q

what does reverse image lookup provide?

A

the image source, higher resolution versions,content creator information about image and locates pages where it appears

37
Q

what is advanced search criteria?

A

perform internet search with criteria combined with logical operators.

38
Q

what does using multimedia online do?

A

use of computer to present and combine text, graphics, audio and video with links and tools to navigator,interact,create and communicate using Internet

39
Q

what is a downlaod?

A

process of receiving data from central server to user computer

40
Q

explain what streaming is?

A

process of delivering data continuously from Internet in real-time.

41
Q

what is buffering?

A

small wait necessary before file begins to play.

42
Q

what helps the streaming experience?

A

good internet connection and large amounts of bandwidth.

43
Q

explain what video on demand or audio video on demand is?

A

a system that allows users to select/watch/listen to video / audio content whenever one desires.

44
Q

what is voice over internet protocol

A

it is communication protocal,technology,methodology and transmission method involved in deliver of voice or multimedia data using IP netowrks

45
Q

what is internet telephony?

A

includes communication services traditionally done using telephone network

46
Q

explain what a podcast is?

A

series of on-demand digital audio files focused on a topic or theme.

47
Q

what is a vodcast?

A

podcast contains video content.

48
Q

what are the advantages of podcasts and vodcasts?

A

content communicated directly
suscribe to podcast feed and new ones are automatically downloaded
listen while doing other things at work, home or commute
listen whenever and wherever you want to with mobile device
On-demand technology means what listeners can decide what to hear when they want to hear it.

49
Q

what is media compression technology ?

A

the process of reducing size of data file.

50
Q

explain what lossy does?

A

reduces number of bits identifying and eliminatiog statictical redundancy. decompress to use requires additional software,storage and expensive hardware.

51
Q

what is MP3?

A

a patented coding format for digital audio in form of lossy data compression.

52
Q

what is MPEG-2

A

standard for coding video files and associated audio trasks

53
Q

what is JPEG

A

method of lossy compression for digital images

54
Q

what is lossless

A

no information is lost it keeps the size of the original and restored file is same.

55
Q

what can lossless do?

A

represent sound digitally because it is broken down into thousands of samples per second stored as a binary number.

56
Q

what does the quality of sound of lossless depend on?

A

bit depth as in the number of bits available for each clip
sample rate as in the number of audio sample captured every second and bit rate the number of bits used per second of audio

57
Q

explain bit depth

A

number of bits allocated to each sample more bits means higher quality audio.

58
Q

explain sample rate.

A

number of measuremets of sound taken each second. each sample represents amplitude of signal at specific point in time

59
Q

explain bit rate

A

number of bits processed every second and it determines audio qucality

60
Q

explain MP3 compression.

A

store many tracks on hard drive and download speed is faster. It is a digital audio file that must be enocoded as a particular file when created

61
Q

what does MP3 do?

A

removes sound humans can’t hear.

62
Q

what is the draw back of compression?

A

amount of compression files need depends on usafe and the trade-off betweeen quality of compressed format and size stored file is transfer speed.

63
Q

explain what a zip file is?

A

compressions system for files compressed into single file because download need less bandwidth,unzipped using utility program with problems which is the samee as original before compression

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