File systems and mount points are often a source of confusion for users (and some administrators). Describe a UNIX file system and how a mount works to attach a disk to a UNIX server.

• How are the contents of a directory are impacted (and when and/or if they are available for use) when a file system is mounted on that directory?
• How does a UNIX system use the contents of the "/etc/fstab" file with respect to file systems?