Which ONTAP feature ensures per-protocol network access by using dedicated LIFs?

• A. DNS resolution
• B. Separate LIFs per protocol
• C. IPspaces
• D. Vserver alias

Answer: (B)

Separate LIFs for each protocol. In ONTAP, a LIF (logical interface) is a network endpoint that can be tied to a specific protocol, such as NFS, SMB, or iSCSI. By giving each protocol its own dedicated LIF, you create distinct network paths and policies for that protocol, ensuring per-protocol access and easier traffic management, isolation, and routing. This setup allows NFS traffic to use one LIF and SMB traffic to use another, potentially on different subnets or VLANs, while maintaining separate export rules and security settings.

DNS resolution handles name-to-IP lookups, not per-protocol access using dedicated LIFs. IPspaces provide network isolation across tenants or segments, but the mechanism that guarantees per-protocol access with separate interfaces is the use of dedicated LIFs for each protocol. Vserver alias is just an alternate name for a Vserver and does not create per-protocol LIF separation.