1.7:System Software V2

1.7:System Software V2

1. Key Word

   • Utility Program
   • Operating System
   • Defragmentation
   • Compression
   • Lossy
   • Loseless
   • Encryption
   • Backup
   • Incremental
   • Full

2. Utility Software

   • Utility programs are designed to do just one or two tasks
   • Utility software interacts with the computers hardware E.G. the disk Drive
   • Utility programs are inbuilt in to the Operating System

3. Utility Programs

   • File Compression
   • Disk Defragmentation
   • File Repair
   • Disk Copying
   • Disk Formatting
   • Disk Backup/Restore
   • Anti-Virus

4. Compression

   • Reducing the size of the file by performing an algorithm on the original data
   • Lossless-The original file can be re-created as no data is lost

5. Defragmentation Software

   • When a hard disk drive is new, files get added onto the disk in order. Very much like starting with a blank piece of paper and adding to it
   • As files are deleted this leaves gaps
   • When new files are saved the files fill the gaps and become fragmented
   • Defragmentation software groups fragmented files back together

6. Encryption Software

   • Encryption emans to scramble data in a way that it is unreadable to anybody who doesn't have a key to be able to unscramble this
   • Data is encrypted using a key and then decrypted using a key
   • Data is encrypted so that it is unreadable if anyone is to intercept it

7. Backups

   • Completed to ensure there is way of restoring files/data/programs in case of computer failure
   • Copies of data and/or software are taken regularly and usually stored in a difrent location
   • Ensures that if computers are stolen or damaged in for e.g. a fire or a natural disaster that data can be restored and a company do not lose much money

8. Backup Types