.NET Magazine - Avoid Disaster Downtime -Table 1

Backup Type	Description
Full	Backs up all data items; clears the backup flags, which indicate the data items have changed and need to be backed up
Incremental	Backs up all data that has changed since the last full or incremental backup; clears the backup flags
Differential	Backs up all data that has changed since the last full or incremental backup; does not clear the backup flags.

Table 1 Choose Your Backup. There are three common types of backups. You're likely to use all of them in different stages of your backup strategy.