Explain Backup Methodology.

The different types of backup methodologies are:

1. Normal Backup:-This is default backup in which all files are backed up even if it was backed up before.
2. Incremental Backup:-In this type of backup only the files that haven’t been backed up are taken care of or backed up.
3. Differential Backup:-This backup is similar to incremental backup because it does not take backup of those files backed up by normal backup but different from incremental because it will take backup of differentially backed up files at next time of differential backup.
4. System Backup:-This type of backup takes backup of files namely, Boot file, COM+Class Registry, Registry. But in server it takes backup of ADS.
5. ASR Backup:-This type of backup takes backup of entire boot partition including OS and user data. This should be the last troubleshooting method to recover an OS from disaster.