Easy

• Types of digital devices:

  Personal computers, servers, mobile devices, entertainment systems, navigation Systems
• More digital devices types:

  Multifunctional devices, digital cameras, data capture and Collection systems, Communication Devices And Systems
• Uses of digital devices1:

  Education and training, personal, social
• Uses Of Digital Devices 2:

  Retail, organisational use, creative tasks
• Input devices:


  Keyboard, mouse, webcam, microphone, game controller, sensor, Scanner, Graphics Tablet
• Output devices:


  Monitor, printer, plotter, projector, speakers, actuator
• Storage devices:

  Hdd, ssd, usb flash Drives, sd cards, optical Disks
• Two ways of processing data:

  Manual and automatic
• Accessibility devices:


  Trackballs, braille and large Key Keyboards, touchscreens, braille embossers, screen magnifiers, Eye Typers
• Types of operating systems:

  Real-Time, single-user single-task, single-user multi-tasking, Multi-user
• Roles of operating systems:

  Networking, Security, memory management, multi tasking, device drivers
• User interfaces:


  Graphical user Interface, command line, menu based, adapted
• Factors affecting the performance and use of operating systems:

  Malware, hardware, virtual memory
• Utility software:


  Disk defragmenter, backup, disk/registry cleaner, software Updates, anti-virus, firewalls
• Application software:


  Productivity software, Graphics/Multimedia Software, personal, communication
• Image file Types:


  Jpg, bmp, Gif, png,svg
• Video file Types:


  Avi, Mp4, Mov, Mkv
• Application file types:


  Word processing ( Doc, Docx, Docm, rtf ), Spreadsheets ( Xlsx, xls, xlsm, csv ), Presentations ( Ppt, Pptx, Pptm, Pdf ), Databases ( Accdb, Mdb )
• Application licenses:


  Open source and proprietary
• Emerging technologies that affect it systems:

  • self driving cars
  • Virtual memory
  • Media Streaming
• Personal use of emerging technologies:

  • Smart watches
  • Smart Speakers
  • Self driving cars
• Organisational use of emerging technologies:

  • Augmented reality
  • 3D Printing
  • Internet of things
• Factors affecting Choice of it systems:

  user experience, user needs, specification, compatibility, connectivity, cost, implementation, security, efficiency, productivity
• Wired methods of connecting devices:

  • usb
  • sata
  • vga
  • hdmi
  • Ethernet cable
  • Fibre Optic
• Wireless methods of connecting Devices:

  • Infrared
  • bluetooth
  • Wifi
  • Mobile Broadband
• Types of networks:


  Lan, Pan, Wan, Vpn
• Factors affecting choice of network:


  User experience, user needs, cost, Compatibility, connectivity, implementation, specification, productivity, efficiency security
• Data transmission protocols:


  Email ( Smpt, pop3, imap ), Voice and video calls over the internet ( sit, rtp, rtcp ), Web Pages ( Http, Https, Ftp ), Secure payment systems ( Set, 3D Secure )
• Data transmission security issues:

  Sniffing, Spoofing
• Data transmission Prevention methods:

  Firewalls, Encryption
• Two types of compressions:

  Lossy, Lossless
• Two types of codecs:

  Hardware and software
• Two types of online systems:

  Cloud storage, cloud computing
• Systems that enable remote working:

  Vpn, Remote desktop technologies
• Factors affecting choosing online systems:


  Security, cost, ease of use, features, connectivity
• Online communities:

  • Social media
  • Blogs, microblogs, vlogs
  • wikis
  • chatrooms
  • instant messaging
  • Forums
  • Podcasts
• Implications of online communities ( Individuals ):

  User experience, Meeting needs, cost, Privacy, Security
• Implications of Online communities ( Organisations ):


  Employee and customer Experience, customer needs, cost, implementation, Replacement or integration with current systems, Productivity, working practices, security
• Threats to data:


  Malware, Hackers, Phishing, Accidental damage
• Protecting data techniques:


  File Permissions, access levels, backup and recovery procedures, passwords, physical access Controls, Digital certificates, Protocols