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NS0-157 · Question #100
NS0-157 Question #100: Real Exam Question with Answer & Explanation
The correct answer is C: FC, FCoE and iSCSI only. Clustered Data ONTAP supports ALUA (Asymmetric Logical Unit Access) for FC, FCoE, and iSCSI, which are all SCSI-based SAN protocols capable of multipath optimization.
Question
Clustered Data ONTAP supports ALUA with which protocols?
Options
- AFC only
- BFC and FCoE only
- CFC, FCoE and iSCSI only
- DFC, FCoE, iSCSI and NFS only
Explanation
Clustered Data ONTAP supports ALUA (Asymmetric Logical Unit Access) for FC, FCoE, and iSCSI, which are all SCSI-based SAN protocols capable of multipath optimization.
Common mistakes.
- A. Limiting ALUA support to FC only ignores FCoE and iSCSI, which are also SCSI-based transports that support ALUA in clustered ONTAP.
- B. Excluding iSCSI is incorrect because iSCSI encapsulates SCSI commands over TCP/IP and fully supports ALUA in clustered ONTAP.
- D. NFS is a NAS protocol and does not use SCSI, so it does not support ALUA; including NFS makes this choice incorrect.
Concept tested. ALUA support across SAN protocols in ONTAP
Reference. https://docs.netapp.com/us-en/ontap/san-admin/selective-lun-map-concept.html
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