LO1

• Input Device -> An input device is something that allows information to be transferred into a device 
• An output device is something that transfers information out of a device and to the user an example is monitor, speaker and headphones
• Input Device

  Keyboard

  Mouse

  Scanner

  Sensors

  Mic

  Graphics Tablet

  Monitor

  Barcode Reader
• Output Device Name

  Monitor

  Printer

  Plotter

  Speaker/ Headphones

  Braille Terminal
• Flash Memory Stick - Flash memory sticks can hold small amounts of data and are portable.
• Storage Devices are used to store data permanently or temporarily.
• Hard Disk Drive (HDD) - Hard disk drives store large amounts of data on spinning disks inside a sealed unit.
• Optical Storage Devices - Optical storage devices use lasers to read or write data onto optical discs such as CD's DVD's and Blu-ray Discs.
• Cloud Computing - Cloud computing refers to using remote servers hosted on the internet to store, manage and process data rather than storing it locally on your computer.
• Optical Storage Devices – Optical storage devices use lasers to read and write data onto optical disks such as CD’s and DVD’s.
• Network Attached Storage (NAS) allows multiple users to access shared folders over a network.
• Solid State Drives (SSD) - Solid state drives do not have any moving parts like traditional hard drives so they are more reliable but less durable.
• Firewire is like a USB but for apple products, it transfers data at high speeds
• USB is used to connect peripherals to computers to allow data to be transferred from external peripherals.
• A SATA port is used to transfer data to external storage devices
• An Ethernet cable is used to connect your computer to the internet or other networks
• A Graphics card is used to display graphical data on a computer screen.
• Fibre channel port is used to transfer data from storage devices to servers and vice versa.
• A storage controller card is used to manage attached storage devices
• A Network interface card (NIC) is used to allow the device to connect to a network and transfer data to other devices
• The CPU is the central processing unit of a computer, which is responsible for processing instructions and data.
• The advantages of Hard Drives are:

  1. large capacity
  2. Cheap to buy and replace
• The Disadvantages of Hard Drives:

  1. Not durable
  2. Not portable
  3. slower access speed than SSD
• Advantages of SSD's

  1. quick
  2. quiet
  3. large capacity
  4. small -> portable
  5. Fast
  6. Durable
• Advantages of cloud storage:

  1. Cheap
  2. easy to access
  3. easy to backup
  4. easy to share
  5. Can collaborate
  6. Frees up storage on device
• disadvantages of cloud storage:

  1. data is stored on a remote server so it is vulnerable to hackers
  2. Requires internet
  3. if attacked by a cyber threat then they can take a lot at once
• Advantages of optical drives:

  1. portable
• Disadvantages of optical drives:

  1. very fragile
  2. slowest access speed
  3. small capacity
• Advantages of Desktops:

  1. Large screens
  2. versatile
  3. parts can be upgraded to improve the computer
• Disadvantage of desktops:

  1. not portable
  2. Very large and bulky devices
  3. Basic computer isn't good enough for web/game designers
• Advantages of Laptop / Tablet / Hybrid:

  1. in- built screen and keyboard (Laptop)
  2. portable
• Disadvantages of Laptop / Tablet/ Hybrid:

  1. Requires internet access
  2. Easily lost or stolen
  3. Small screens / restricted screen size
• Advantage of embedded systems:

  Made for a specific function
• disadvantages of embedded systems:

  1. expensive
  2. difficult to maintain
  3. May not have been tested thoroughly
• The internet of things (IoT) is all smart devices that use internet are connected together and can communicate with each other.
• Advantages of mainframe systems:

  • very reliable as a team is working on it all the time and they come with many backups
  • can perform calculations very quickly
• Disadvantages of mainframes:

  • expensive to install and maintain
  • Requires expertise
• Advantages of quantum computing:

  • even quicker than mainframes at solving calculations that are almost impossible
  • very large storage capacity as it works with qubits
• Disadvantages of quantum computing:

  • Expensive
  • Not fully developed
  • Security issues if developed correctly meaning our security will be useless
• fibre optic cables better than copper wires as they have Higher bandwidth and faster data transmission. Don't suffer from electromagnetic interference or attenuation