SK0-003 · Question #368
A NAS differs from a SAN because NAS:
The correct answer is D. always uses an IP address to access data. NAS (Network Attached Storage) differs from SAN (Storage Area Network) primarily because NAS always uses an IP address and standard network protocols to access data, presenting storage as a file share, whereas SAN provides block-level access typically over Fibre Channel or iSCSI.
Question
A NAS differs from a SAN because NAS:
Options
- Ais attached to a local disk controller.
- Bdoes support multipath I/O.
- Cnever uses an IP address for network connectivity.
- Dalways uses an IP address to access data.
How the community answered
(56 responses)- A5% (3)
- B2% (1)
- C2% (1)
- D91% (51)
Why each option
NAS (Network Attached Storage) differs from SAN (Storage Area Network) primarily because NAS always uses an IP address and standard network protocols to access data, presenting storage as a file share, whereas SAN provides block-level access typically over Fibre Channel or iSCSI.
NAS is a network-attached device; while it contains local disk controllers internally, its differentiation from SAN is how it presents storage externally, not its internal hardware attachment.
Both SAN (especially iSCSI SAN) and modern NAS solutions can support multipath I/O for redundancy and performance, so this is not a distinguishing factor.
NAS absolutely uses IP addresses for network connectivity; its very nature is 'Network Attached Storage,' relying on TCP/IP for file sharing.
NAS (Network Attached Storage) connects to the network as a standalone network device and is accessed by clients using standard network file-sharing protocols like NFS or SMB/CIFS, which inherently rely on IP addresses for communication. This means data access to a NAS is always performed over an IP network using an IP address.
Concept tested: NAS vs. SAN differences
Source: https://learn.microsoft.com/en-us/azure/storage/common/storage-introduction#storage-area-network-san-and-network-attached-storage-nas
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