Which type of storage system is directly attached to a computer and does not use a storage network between the computer and the storage system?
A. NAS
B. SAN
C. DAS
D. Network share
Answer: C
Direct-attached storage (DAS) refers to a digital storage system directly attached to a server or workstation, without a storage network in between. Devices may be attached via USB, eSATA, etc.
A NAS device contains a slimmed-down operating system and file system and processes only I/O requests by supporting the popular file sharing protocols, primarily CIFS for Windows and NFS for Unix.
A Storage area network, or SAN, is a high-speed network of storage devices that also connects those storage devices with servers. It provides block-level storage that can be accessed by the applications running on any networked servers.
A network share is a device or piece of information on a computer that can be remotely accessed from another computer, typically via a local area network or an enterprise Intranet, transparently as if it were a resource in the local machine.
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