LU6 - Internet

Question 1

Evolution of the internet

Answer 1

Revolutionised the way we communicate, widespread information and communication infrastructure

Question 2

Web 1.0

Answer 2

• Earliest stages in WWW
• Web users could only view Web Pages(No interaction)

(Consumers of content)

Webmaster controlled content of web pages

Read-only, company focus(Home Pages)

Question 3

Web 2.0

Answer 3

Describes websites that could be interacted and communicated with
(Blogs, wikis, social networking, video sharing sites all merged)

Better user-interface, software and storage of data

• Users could make changes to web pages
• Fast and efficient way to share content
• Users can receive notifications for updates

Read/Write, community focus, sharing content

Question 4

Web 3.0

Answer 4

Provides user with more personalised experience

Each user will have unique internet profile

(More customised to user-preferences, user behaviour, User-engagment

Question 5

Web 4.0

Answer 5

Needed to adapt for mobile devices (Mobile web)

Connects all device in real and virtual world in real time

(Autonomous, proactive, content-exploring, self-learning, collaborative)

Question 6

Client-Side Scripting

Answer 6

The user requests a web page from a server, the server finds page and sends it to user

The page is displayed on the browser with any scripts running on or after display

Question 7

Server-side Scripting

Answer 7

User request web page from server

Script is interpreted by the server creating or changing the page content to suit user

The page in its final form is sent to the user and the cannot be changed using server side scripting

Question 8

Cookies

Answer 8

Small piece of data sent from a website and stores in user’s web browser while using a website

When user uses website in future, the data can be accessed, retrieved and notifies of your previous activity

Websites remember activity and what you search for

Question 9

Web Based Applications

Answer 9

Web browser tool, application, prorgam or app, is software that runs on your web broswer

(Only needs internet connection and browser to function)

• Google docs (word processor)
• Google sheets (Spreadsheet app)
• Gmail (for emails)
• Drive (for files/folder storage)
• Classroom (educational tool)

Question 10

Native Mobile Application

Answer 10

Written using native development language and tools specified to platform of device

Developed for specific platform

Developers need full access to device capabilities

Apps need to be redesigned for various platforms( IOS differs from Android)

Question 11

Hybrid Mobile Application

Answer 11

Blend of native and web solutions

Core of application, written using platform technologies( HTML, CSS, JavaScript) which are encapsulated in native application

Question 12

Design technology

Answer 12

Screens (sensitivity and resolution( good resolution = greater power consumption))

Processing Demands - devices are improving in processing power

Storage Demands ( mobile devices have limited storage = applications need to be efficient in storing)

Bandwidth requirements

Question 13

Plug-in (Add-in/on)

Answer 13

software module that adds a special feature to existing computer program to customise program / adds extra functionality

(Adobe Flash Player - Videos)
(Java Virtual Machine - running applets)

Question 14

Extension

Answer 14

small software module that provides customisation for web browser

(Productivity tools, password management, ad blocked, cookie management)

Question 15

Browser plug-in

Answer 15

Browser Plug-ins are always executable

Browser extensions are usually source code

Question 16

Search Engine

Answer 16

Program that searches the web for specific keywords, and returning a list of web pages matching search criteria

(Shazam)

Question 17

Download

Answer 17

Is the process of receiving data from central server to user’s computer

source can be web server, FTP Server, email server

A copy of file downloaded is saved to storage location on your device and may be viewed when online or offline

Question 18

Streaming

Answer 18

Process of delivering data continuously from internet in real time.

Question 19

Video-On-Demand (VOD)

Answer 19

Systems which allow users to select , watch/listen to video or audio whenever desired

(DSTV, CATCH-UP)

Question 20

VOIP (Voice over Internet Protocol)

Answer 20

Is the communication protocol involved in delivery of voice and multi-media data using IP network

Question 21

Media Compression

Answer 21

Encoding the data so that it can be transferred or stowed using fewer bits than originally contained

Question 22

Lossy Compression

Answer 22

Reduces the number of bits by identifying and eliminating statistical redundancy

Trade off between information lost, and size reduction

(JPEG Files)

Question 23

Lossless compression

Answer 23

No information is lost, size of original file and restored file is the same

Question 24

Sample Rate (Audio File)

Answer 24

Number of measurement of the sound taken each second

The more Samples taken, the better the quality audio and more accurate capturing of the sound wave

Question 25

Bit depth (Audio File)

Answer 25

The number of bits allocated to each sample

The more bits to store each sample in = higher quality of audio

Question 26

Bit rate (Audio File)

Answer 26

The number of bits processed every second and are usually measured in kilobits per second

Bit rate determines the quality of the audio.

If low then more information will be discarded when decompressing the file

Question 27

MP3 Compression

Answer 27

Audio files that are uncompressed are of high quality
(WAV and AIFF)

The amount of compression that is required for files will be dependent on the use of file and size.
And speed of the transfer of the file