NS0-157 · Question #383
Which of the following steps must be completed before a CIFS share can be active?
The correct answer is A. Configure name mapping. In ONTAP, name mapping must be configured before a CIFS share can serve data because ONTAP uses UNIX credentials internally and requires a mapping from Windows identities to UNIX UIDs for all file operations.
Question
Which of the following steps must be completed before a CIFS share can be active?
Options
- AConfigure name mapping
- BLicense both NFS and CIFS
- CCreate a data LIF for the CIFS server on every node
- DReboot the node containing the CIFS Vserver root volume
How the community answered
(54 responses)- A87% (47)
- B4% (2)
- C7% (4)
- D2% (1)
Why each option
In ONTAP, name mapping must be configured before a CIFS share can serve data because ONTAP uses UNIX credentials internally and requires a mapping from Windows identities to UNIX UIDs for all file operations.
ONTAP's security architecture requires every operation - including SMB/CIFS access - to resolve to a UNIX user identity internally. Name mapping defines how Windows user accounts translate to UNIX UIDs and GIDs. Without a valid name mapping, the CIFS server cannot authorize file access requests, making the share effectively non-functional even if it is created.
Only the CIFS license is required to serve SMB shares; NFS does not need to be licensed for CIFS functionality to work.
A data LIF is required for CIFS traffic, but it only needs to exist on the nodes hosting the CIFS server - not on every node in the cluster.
ONTAP does not require a node reboot to activate a CIFS server or its shares; the CIFS service starts dynamically without a reboot.
Concept tested: ONTAP CIFS name mapping prerequisite for share access
Source: https://docs.netapp.com/us-en/ontap/smb-admin/configure-name-mapping-concept.html
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