What are the various methods of back-up?

Back-up is the process where the data is stored in another media for prevention from data loss. These methods are:

1. Full Back up:
   Complete back up is taken of the computer this includes all drives, directories and files.
2. Incremental Back up:
   Back up is taken for only those files which have changed since the last back up done.
3. Differential Back up:
   Back up of only those files are taken which have changes since the last full back up. This usually helps when it is important to have new version of files. New version files often over writes the old version files when the same tapes or cd’s are used for back up.

Related FAQ's:

What are the causes of data loss?
How can I prevent data loss?
What to do when there is a data loss?
How often should I back-up the data?
Can the backup plans help in protecting data in disaster situation?
What do you mean by on-line back-up and off-line back-up?

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