CompTIA Network+ N10-006 Q36

A SQL server needs several terabytes of disk space available to do an uncompressed backup of a database. Which of the following devices would be the MOST cost efficient to use for this backup?

A. iSCSI SAN
B. FCoE SAN
C. NAS
D. USB flash drive

Correct Answer: C
Section: Network architecture

Explanation:
A NAS is a Network Attached Storage device; typically a bunch of cheap hard disks, usually arranged in a Raid and consisting of either SAS (serial attached SCSI) or Sata disks just like the ones in most desktops.
A NAS is essentially a file server that connects to an Ethernet network and is configured with a TCP/IP address. A NAS supports Windows networking and works at the file level as opposed to a SAN (Storage Area Network) which works at the block level when dealing with data. You can access file shares on a NAS in the same way that you would access file shares on a file server.
A NAS is a much cheaper option than a SAN.