Which feature would you configure on the storage controller to restrict a host's view to specific LUNs?

Which feature would you configure on the storage controller to restrict a host's view to specific LUNs?

• A. Zoning
• B. LUN Masking
• C. Port Masking
• D. VLANs

Answer: (B)

LUN masking is the feature that controls which storage LUNs a given host can see. By configuring masking on the storage array, you bind the host’s initiators (usually identified by WWNs or iSCSI names) to a specific set of LUNs. Only those LUNs are presented to the host, while all others are hidden, preventing access to data intended for other hosts. This provides isolation at the storage layer and ensures the host operates only with its assigned LUNs. Zoning limits fabric paths, Port Masking restricts which switch/storage ports are usable, and VLANs handle network segmentation, but they don’t selectively reveal or hide individual LUNs from a particular host the way LUN masking does.

LUN masking is the feature that controls which storage LUNs a given host can see. By configuring masking on the storage array, you bind the host’s initiators (usually identified by WWNs or iSCSI names) to a specific set of LUNs. Only those LUNs are presented to the host, while all others are hidden, preventing access to data intended for other hosts. This provides isolation at the storage layer and ensures the host operates only with its assigned LUNs. Zoning limits fabric paths, Port Masking restricts which switch/storage ports are usable, and VLANs handle network segmentation, but they don’t selectively reveal or hide individual LUNs from a particular host the way LUN masking does.