Revision

Revision

1. Computing systems

   • File
     • Anything you save. It could be a document, a piece of music, a collection of data or something else.
   • Server
     • A computer that holds data that is shared with other computer. A web server stores and websites
   • Folder/sub-folder
     • A place to store files that are related, eg. all of the files relating to one project. Folders help to keep work organised. Sometimes called a directory A sub-folder is a folder inside another folder.
   • Security
     • Is where data can be protected online or hardware from unauthorised users
   • Passwords
     • A password is a few charictersand symbols and numbers combined together to make a password
   • Alphanumeric
     • Is a mixture of a few letters and numbers
   • File Management
     • The organisation of files and folders using suitable names(that gives the identity of a file and placed into folders

2. Cloud computing advantages

   • Independence
     • The user can work with their files on different computers
   • Cost
     • The user doesn't need to buy the latest software as it might be freely accessible through apps
   • Reliable software
     • Web software and browsers are updated online. The user doesn't have to download the latest updates
   • Compatibility
     • Documents and files are designed to be compatible across different machines and browsers

3. cloud computing disadvantages

   • Security
     • Data stored online is vulnerable to security attacks
   • Connection
     • The user can only access their information if they have a network connection
   • Software
     • Web apps do not usually have many detailed functions as a full software package

4. Hardware

   • The physical parts of a computer system
   • Input
     • An input device is any piece of computer hardware used to provide data to a computer system
   • Output
     • An output device is any piece of computer hardware used to communicate the results of data that has been processed
   • Processing
     • Carrying out a set of instructions
   • Memory
     • A part of a computer that stores data
   • Storage
     • A storage device is a piece of computer equipment which can be used to store data.
   • Peripherals
     • A peripheral device is known as a computer device, such as a keyboard or printer, that is not part of the essential computer.
   • Embedded
     • Embedded computers are used in car engines, spacecraft and MP3 players. They are dedicated systems that are designed for a fixed purpose.
   • Magnetic
     • Embedded computers are used in car engines, spacecraft and MP3 players. They are dedicated systems that are designed for a fixed purpose.
   • Solid state
     • Embedded computers are used in car engines, spacecraft and MP3 players. They are dedicated systems that are designed for a fixed purpose.
   • Optical
     • Optical devices use a laser to scan the surface of a spinning disc made from metal and plastic.
   • CPU
     • The purpose of the CPU is to process data. The CPU is where processes such as calculating, sorting and searching take place.
   • RAM
     • Random Access Memory (RAM) is a fast temporary type of memory in which programs, applications and data are stored.