An external storage unit that is self-contained and provides shared file-level access is referred to as:

An external storage unit that is self-contained and provides shared file-level access is referred to as:
A . Small Computer System Interface (SCSI).
B . Storage Area Network (SAN).
C . Network Attached Storage (NAS).
D . Direct Attached Storage (DAS).

Answer: C

Explanation:

Network-attached storage (NAS) is file-level computer data storage connected to a computer network providing data access to a heterogeneous group of clients.NAS not only operates as a file server, but is specialized for this task either by its hardware, software, or configuration of those elements.NAS is often manufactured as a computer appliance C a specialized computer built from the ground up for storing and serving files C rather than simply a general purpose computer being used for the role.