SQL Server 2005 Backup
Most of the people, if not all, who work around the SQL Server know how to backup their databases by heart. They can even do the task in their sleep. Some may find this article useful, though.
What we're going to do here is do the 3 backup types: Full, Differential, and Transaction Log Backups.
Here's how to backup a SQL Server Database (suppose we're backing up the AdventureWorks Database):