200-150 · Question #223
Which two protocols can you use SAN storage that is accesses via low-latency, high-bandwidth networking? (Choose two.)
The correct answer is D. FCP E. iSCSI. SAN storage relies on block-level protocols to achieve low-latency, high-bandwidth access. FCP and iSCSI are the two block-level SAN protocols, while AFP, CIFS, and NFS are file-level NAS protocols.
Question
Which two protocols can you use SAN storage that is accesses via low-latency, high-bandwidth networking? (Choose two.)
Options
- AAFP
- BCIFS
- CNFS
- DFCP
- EiSCSI
How the community answered
(27 responses)- A4% (1)
- C7% (2)
- D89% (24)
Why each option
SAN storage relies on block-level protocols to achieve low-latency, high-bandwidth access. FCP and iSCSI are the two block-level SAN protocols, while AFP, CIFS, and NFS are file-level NAS protocols.
AFP (Apple Filing Protocol) is a file-level sharing protocol designed for macOS environments and is used for NAS access, not block-level SAN storage.
CIFS (Common Internet File System) is a file-level protocol used for Windows network file sharing, making it a NAS protocol rather than a block-level SAN protocol.
NFS (Network File System) provides file-level access over a network and is associated with NAS environments, not the block-level storage access that SANs require.
FCP (Fibre Channel Protocol) transports SCSI commands over a dedicated Fibre Channel fabric, providing the extremely low latency and high bandwidth required for enterprise SAN storage. It is a block-level protocol and is the foundational transport for traditional Fibre Channel SANs.
iSCSI encapsulates SCSI block-level commands inside TCP/IP packets, enabling SAN storage access over standard Ethernet infrastructure. It delivers low-latency, high-bandwidth block storage without requiring a dedicated Fibre Channel fabric.
Concept tested: SAN block-level protocols FCP and iSCSI
Source: https://www.cisco.com/c/en/us/products/storage-networking/san-protocols.html
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