LO1 - Global Information Flashcards
Who are the Holders of Information
- Individuals
- Business Organisations
- Government
- Healthcare services
- Charities/ Communities
Examples of where Data is held
- Developed/ Developing countries
- Urban/ Rural areas
What is Digital Divide
The difference in access to digital resources in different areas of the world
What are the Types of Information Storage Media
- Paper
- Optical Media (CD DVD)
- Magnetic Media (Hard Drives)
- Solid State Media (SSD CARD)
About Optical media
- key use is for software distribution
- they are written and read by a laser
About paper
- Can be easily damaged when handled
- Costs a lot to transport
- Can be hard to keep secure
About Magnetic Media
- uses magnetic patterns to store data
- can be stored externally
- can be stored on tapes
- frequently used for backup/ archiving
About Solid State Media
- stores in circuitry
- speed is good
- doesn’t require air cooling
- they lack moving parts - so don’t overheat
Characteristics of storage media
- Mutability
- Robustness
- Access to Data
- Cost
- Storage Capacity
Mutability
ability to change
Robustness
Solid state Media -
No moving parts
less likely to be damaged if dropped
Hard Drives -
rely on internal spinning disks
frequently damaged when dropped
Magnetic Media -
If placed near magnets - info held can be inaccessible
Cost
Paper - is cheap but delivery is expensive
Hard Drives - cheaper but slower than SSD cards
Purpose of Storage Media
- is to store data/ information
Advantages + Disadvantage of Storage media
SSD - robust
Magnetic Hard Disc - less likely to be dropped
= cheap
CD are cheap therefore can be disposed after using temporarily
Types of info access and storage devices
- handheld
- portable
- shared
fixed
Characteristics of storage + access devices
- processing power
- versatility
- storage capacity
Purpose of storage +access devices
Handheld devices - tasks that don’t need high processing power
Laptop - tasks can require high processing power
Type of internet access
- dial up
- broadband
- fixed broadband
- fixed wireless
- satellite
- wireless hotspot
- mobile phones
type of connection
copper cable - electrical conductivity of copper, low cost, popular
optical fibre - uses strands of glass, data is transferred as pulses of light
types of WWW Technology network
HTTP
URL
HTML
Types of WWW technology
Intranet
Internet
Extranet
What is Internet
is worldwide network of interconnected networks
public
open access
purpose of internet
a webpage on the internet provides customers with access to info they need
What is intranet
a private network
only accessible to authorised users
closed access
What is Extranet
private network
accessible using the internet but provides access only to authorised users
shared access
What is extranet
private network
accessible using the internet but only accessible only to authorised user
shared access
example of extranet
hotel booking companies
Network Characteristics
speed
security
access levels
accessibility
Types of Information Formats
web pages
blogs
podcasts
streamed audio/video
social media
emails
document stores
RSS feeds
Web pages
STATIC -
contain content that is prebuilt + remains the same each time the page is loaded
cheaper
easier to create
loads quicker
appears same for everyone
DYNAMIC -
are generated when they are loaded
appear differently for everyone
harder to code
Blogs
ADVANTAGES
share information (text, images + videos)
unite with similar interests
DISADVANTAGES
takes a lot of effort + time
have to update regularly
difficult to build a customer base
Podcasts
a downloadable audio file
ADVANTAGES
aren’t recorded live
listen when convenient
are more popular
audience is increasing
DISADVANTAGES
takes time to record/ edit
difficult to build audience
have to be innovative
streamed audio + video
a process of receiving video/audio data in a continuous flow
ADVANTAGES
doesn’t require data - can be downloaded
harder for users to share
piracy protection
DISADVANTAGES
requires high bandwidth
may suffer performance issues
requires a constant internet connection
Social media
ADVANTAGES
online presence
posts can be shared within users
different info styles
communication
DISADVANTAGES
negative posts spread quickly
can damage repuatation
Emails
ADVANTAGES
faster
cheaper
files can be attached
convenient
DISADVANTAGES
need internet connection
malware can spread - risk of phishing
spam
Document stores
allows users to store online files in cloud storage
are convenient
accessible
need internet connection
need an account
RSS feeds
Rich Site Summary
— allows users to subscribe to updates from fave webs
Advantages of Internet (individuals)
increased speed of personal communication - instant messaging
Easy access to info - free resources
24/7 access to services - shopping, browsing + banking when convenient
social interaction w others - provides entertainment
Disadvantages of internet (individual)
potential for identity theft - uploading personal data
cost of connection and services - internet providers charge monthly fees
source of distraction - students neglect work for entertainment
cyberbullying + trolling - abuse of social media (anonymity)
spreading misinformation - biased information
Advantages of internet (organisations)
share data quickly - cloud storage
online services always available - ecommerce
easy internal communication - staff can use email
open up to the workplace - can work from home
Disadvantages of internet (organisations)
Malicious attacks/ threats - websites can be hacked
cost of maintaining services- require iT department
reputation and controversies - data leaks, social media
