Compared with object storage service OBS and elastic file service SFS, block storage service EVS mainly uses?

Question

Options

• AHTTP
• BSCSI
• CCIFS
• DNFS

• A
  3% (1)
• B
  72% (21)
• C
  7% (2)
• D
  17% (5)

Explanation

EVS is a block storage service that presents raw storage volumes to virtual machines, and block storage communicates using SCSI (Small Computer System Interface) - the protocol designed for direct, low-level disk access between a host and a storage device. HTTP (option A) is the protocol used by object storage services like OBS, which expose data through REST APIs over the web. NFS (option D) and CIFS (option C) are both file-sharing protocols used by elastic file services like SFS - NFS for Linux/Unix clients and CIFS for Windows clients - neither of which applies to block-level storage.

Memory tip: Match the storage type to its abstraction level - object storage talks HTTP like a website, file storage talks NFS/CIFS like a shared drive, and block storage talks SCSI like a raw disk plugged directly into a server.

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