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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.

Cisco Data Center Storage

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)
  • A
    4% (1)
  • C
    7% (2)
  • D
    89% (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.

AAFP

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.

BCIFS

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.

CNFS

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.

DFCPCorrect

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.

EiSCSICorrect

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

Topics

#SAN#FCP#iSCSI#storage protocols

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