CompTIA
CAS-002 · Question #549
CAS-002 Question #549: Real Exam Question with Answer & Explanation
The correct answer is C: iSCSI. iSCSI operates at the block level over IP networks, bypassing file system abstractions and granting direct access to raw storage blocks, which creates significant security and data integrity risks.
Question
Which of the following should be used with caution because of its ability to provide access to block level data instead of file level data?
Options
- ACIFS
- BNFS
- CiSCSI
- DNAS
Explanation
iSCSI operates at the block level over IP networks, bypassing file system abstractions and granting direct access to raw storage blocks, which creates significant security and data integrity risks.
Common mistakes.
- A. CIFS (Common Internet File System) is a file-level protocol that provides access to files and directories, not raw block data.
- B. NFS (Network File System) is also a file-level protocol that presents data as files managed by a remote file system, not as raw blocks.
- D. NAS (Network Attached Storage) is a storage device category that typically uses file-level protocols such as NFS or CIFS, not block-level access.
Concept tested. iSCSI block-level storage access security risks
Reference. https://www.rfc-editor.org/rfc/rfc3720
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