ICT Revision

ICT Revision

Online Services
1. Communication
  1. Blogs
  2. Email
    1. This service is about moving data between users.
  3. Instant messaging
2. Commerce
  1. Retail sales
    1. Businesses buying selling and money services like banking
  2. Internet banking
  3. Auction websites
3. Government
  1. Taxes
  2. e-voting
    1. Involves public services, such as government bodies, like the DVLA and local council.
  3. Applications for services or grants
4. Real-time information
  1. Weather
    1. This service is used to get up-to-date information
  2. Train timetables
  3. News services
5. Entertainment
  1. Online gaming
    1. Involves using the internet for leisure and fun.
  2. Radio players
  3. Catch-up TV
6. Education
  1. BBC Bitesize
  2. Online learning
    1. Online training and learning.
  3. Online training
7. Business
  1. Collaborative working
  2. Business networks
    1. It involves businesses using websites to make their business more efficient or to save money.
  3. Video conferencing
8. Virtual learning environment (VLE)
  1. Eg. Moodle and Blackboard
    1. Its a virtual classroom that allows teachers and learner to communicate.
9. Download services
  1. Music/films
    1. Files that can legally be downloaded onto the users computer.
  2. Software
  3. Upgrades
Online Advertising
1. Pay-per-click advertising
  1. A web page will host an advert for another orginisation.
    1. This is know as an affiliate model
  2. If a user clicks one of these links it takes them directly to the advertisers website.
  3. The host will receive payment for every click on the advert
2. Pop-up Advertisments
  1. Can get very annoying
  2. Good at catching the users attention
  3. People get usually instantly close them when the occur
3. This is designed to capture and hold the attention of a user to promote a product or service
  1. There's a range of methods for this
File compression
1. Advantages
  1. Saves memory on computers
  2. Files will upload and download quicker
  3. Files will fit better restrictions, such as on an email limit
2. Compression is also known as 'Zipping'
  1. .Zip
    1. These are all the possible file extensions which are created by different algorithms
  2. .Rar
  3. .7z
  4. .Dmg.
3. How it works
  1. The Index in file compression allows any deleted data to be recreated when it is taken out of its 'Zipped' formation
    1. These two points allow a file to be broken down to be transferred or to save memory then recreated the exact same when required.
  2. The Algorithm, is used to make the file (or group of files) smaller whilst leaving enough data for it to be recreated
4. Key words
  1. Index
    1. move from one predetermined position to another in order to carry out a sequence of operations.
  2. Algorithm
    1. a process or set of rules to be followed in calculations or other problem-solving operations, especially by a computer
Online software and backups
1. Reasons for back-ups
  1. If you obtain a virus
  2. If files are corrupt
    1. Backups are used to restore an older version of a file that you already have, this can be done to remove anything unhealthy from a file.
  3. If files are deleated accidentally
2. Online software
  1. Updated automatically
    1. Online software is accessed through a web browser and is available where ever there is an internet connection
  2. backed up automatically
  3. Can be used on different devices
  4. Can be used on different operating systems
Collaborative working online
1. Advantages
  1. Users can work on the same document instead of having different versions of the same file
  2. Users don't need to travel, this saves them money
2. Version control
  1. locking the file and making it read only while others are viewing or editing it
  2. The software allocating version numbers and dates of editing
3. Different people can have a different levels of access
  1. This is usually set by passwords
    1. Teachers have more access than students
4. Permissions
  1. Read only
    1. Users can look at it but make no changes
  2. Read/write
    1. Users can look at it and make changes
  3. Full control
    1. User can do anything to the file even delete it
Voice over internet protocol
1. Advantages
  1. Reduces travel cost and time
    1. VoIP is a method of real-time communication over the internet. The audio and video data is transmitted as the two computers are connected through unique IP adresses
  2. Users internet-only so there isn't any additional cost
  3. Able to contact someone anywhere in the world where there is internet
2. Disadvantages
  1. Relies on internet connection
  2. There are threats such as hackers
  3. Voice quality can be affected
Online communication
1. Publishing information
  1. Blog
    1. A web log- an online journal or diary
  2. Microblogging
    1. A website or app where short messages are exchanged
      1. Twitter
  3. Wiki
    1. A website where anyone can edit or add to the information
  4. Podcast
    1. Audio or video files (usually published in an episode)
  5. Chat room
    1. A place web users can communicate
  6. Chat
    1. Ann exchange of messages (often typed)
2. Sharing information
  1. Social networks can draw people with similar interests together
  2. An online community is a virtual community which only exists online
    1. This is also know as a network of friends
3. Online communities
  1. Often exists in virtual world
    1. This is an unreal world that only exists online
  2. Some communities need users to be involved at the same time, such as some online games where you can interact with each other
4. Netiquette
  1. This is a set of rules which users have to agree to online
    1. Don't use capitals (it can mean shouting)
    2. Appreciate privacy
    3. Not making unkind comments
5. Profile
  1. Includes name and details
  2. Privacy can be changed how the user likes
  3. You are shown by your avatar
    1. This avatar represents your profile
6. Instant messaging
  1. This is a way to exchange messages instantly between two (or more) users
  2. Online software is used to obtain a connection between the two (or more) locations
  3. This is a place where people can send files, messages, images and use emoticons to represent their feelings
7. Advantages
  1. Able to communicate in real time
  2. Cheap to use
  3. Able to video share, game, etc.
8. Disadvantages
  1. Viruses could spread
  2. Needs internet access
  3. May lead to misunderstadings

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	Created by Thomas Grainger over 7 years ago