Data Compression & Backup

Question	Answer
What is Compression?	> Reduction of a file size (and therefore disk space taken up) by applying a certain algorithm > Algorithm is either lossy (not all original data can be recovered) or lossless (no data is lost) > Files must be decompressed before they are read again
What are some Examples of the Uses of Compression?	> Archived files, i.e., those that won't be accessed regularly > Files that are to be transferred on a network, to speed up network transfer
What is Backup Software?	> Software that creates a copy of important data, and stores it in an external location > Ensures that if one copy becomes lost or corrupted, the file can be restored using another
What is a Full Backup?	> A backup that makes a copy of everything on the system onto backup media > Extremely slow process that takes up a lot of space > Very easy to restore a system from
What is an Incremental Backup?	> Only the files that have changed since the last backup are copied > Faster and use less space > More difficult to restore a system from since the most recent full backup must be applied first, then each incremental backup in the correct order

Resource summary

	Created by Malachy Moran-Tun over 2 years ago

	Copied by Malachy Moran-Tun over 2 years ago