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IT > internet gr 11 > Flashcards

internet gr 11 Flashcards

1
Q

web evolution

A

web 1.0 static - only able to view web pages
web 2.0 - can listen to audio, communicate w others, user generated sites, real time notifications
web 3.0 semantic web- blogs, personalised
web 4.0 mobile web, bots, connects devices in real world and virtual world in real time
web 5.0 neural networks

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2
Q

client side scripting

A

used to make web pages change after they arrive at the browser
makes pages interesting + user friendly
used for appearance + interaction

user requests web page from server
server finds page and sends it to user
page displayed on browser w scripts (set of instructions) running after display

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3
Q

server side scripting

A

allow users to have individual accounts + provides data from database
allows privacy,personalisation + provision of info
run on server- never seen by user

user requests web page from server
script in page is interpreted by server changing page content to suit user + occasion

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4
Q

comb of client and server side scripting

A

server side - handle logging in, personal info and preferences + provide data user
client side- page interactive, data displayed and sorted in ways as required by user

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5
Q

cookies

A

small piece of data sent from website + stored in web browser
website made aware of user’s prev activity
makes it easier to visit site again + makes site more useful to you

small text file saved in users browser to store their history and preferences

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6
Q

web based applications

A

software that runs on web browser
need internet to be accessible (limited functionality, accessible on diff devices-synchronous ,not limited to OS)
google classroom, gmail,docs,sheets
office online, office 365

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7
Q

web based applications advantages

A

no need to purchase and install software
accessed anywhere any time w internet
not limited by OS
kept up to date

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8
Q

mobile website

A

web based application run on mobile device
separate site for mobile due to diff in size, OS system + don’t have separate key board
condensed version of full desktop site
content streamlined , large files removed

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9
Q

responsive web

A

design philosophy and set of techniques to create positive user experiences for devices adapting to screen size

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10
Q

mobile applications.

A

applications downloaded + installed on mobile devices
can access stuff from Internet or download content so internet connection not required

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11
Q

native mobile apps

A

written in native development language specific to platform of device (iOS, android)

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12
Q

hybrid mobile apps

A

blend of native + web solutions
written w cross platform web technology (HTML,CSS,JavaScript)
plugins/extensions - piece of code added that adds functions

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13
Q

design factors to consider for mobile devices

A

-screens : sensitivity to touch, quality of resolution
processing demands:consider processing specs of smartphone processors
storage demands: mobile devices have limited storage
bandwidth requirements- bandwidth requirements of app important

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14
Q

plug in vs extensions

A

plug ins- software module to add special feature/customise computer program .exe
extension- small software module that provides customisation of web browser

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15
Q

search engines

A

program that searches web for specified keywords + returns list of web pages that match criteria

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16
Q

lossy compression

A

reduces no. of bits by identifying and eliminating statistical redundancy

17
Q

lossless

A

no info lost
size of og file and restored file are same

18
Q

what is quality of sound dependent on

A

sample rate - no. of audio samples captured every second
bit depth- no. of bits available
for each clip
bit rate - no. of bits used per second of audio

19
Q

download

A

receiving data from central server to users computer
copy of file saved to storage location on your computer
can be viewed offline

20
Q

streaming

A

delivering data continuously from internet in real time
video audio files played as opened on computer
not saved on computer
sometimes small wait (buffering) is necessary before file plays
requires internet connection

21
Q

VOD/AVOD

A

video on demand
audio and video on demand
systems which allow user to select and watch/listen to video or audio content whenever they desire
stream programs to device so broadcast in real time orrr download it to view later

22
Q

VoIP

A

voice over internet protocol
communication protocols, technologies,methodologies and transmission methods involved in delivering voice and multimedia data using IP networks (eg internet)
skype,discord,zoom- VoIP apps - can bypass traditional phone systems

23
Q

podcast/vodcast

A

podcast - series of on demand digital audio files accessible online but can be downloaded
content communicated directly to you
if subscribed- next episode automatically downloads
can listen whenever wherever while doing something else
vodcast - podcast contains video content

24
Q

mp3 compression

A

uncompressed audio files - high quality WAV or AIFF up to 30mb
compressed - MP3 w 3mb w minimal loss of quality
compression removes frequencies we cannot hear

25
Q

media compression

A

encoding the data so that it can be transferred or stored using fewer bits than it originally contained

26
Q

data compression

A

process of reducing the size of a data file

27
Q

lossy compression

A

reduces number of bits by identifying and eliminating statistical redundancy
eg. jpeg
- rounds off less important visual info, trade off between info lost and size reduction

28
Q

lossless compression

A

no info is lost in lossless compression, size of original file and restored file are the same

29
Q

quality of sound

A

sample rate - no. of audio samples captured every second (more samples taken, higher quality audio )
bit depth - no. of bits available for each clip (more bits, higher quality the audio)
bit rate- no. of bits used per second of audio (the lower the bit rate, the more info the encoder will discard when compressing the file)

IT (14 decks)

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