For a storage area network design, which technology allows a switch to support multiple Fibre Channel IDs per fabric port?

NPIV allows a single physical F_Port on a Fibre Channel switch to register and assign multiple Fibre Channel Identifiers (FCIDs) to a connected device, enabling hypervisors and virtual machines to each have their own unique FCID and appear as independent nodes on the SAN fabric without requiring dedicated physical ports.

Inter-VSAN Routing (IVR) enables communication between storage devices in separate VSANs and has no relationship to assigning multiple FCIDs per fabric port.

Zoning is a fabric security mechanism that controls which nodes can communicate with each other and does not affect the number of FCIDs assignable per port.

Fabric Port Trunking aggregates multiple inter-switch links for increased bandwidth between switches and does not enable multiple FCID assignments on a single fabric port.

N-Port Virtualization (NPV) is a switch mode where the device proxies N_Port connections to a core fabric switch to reduce domain ID consumption, but does not assign multiple FCIDs per individual fabric port.

Expansion Port Trunking bundles multiple E_Port inter-switch links for increased trunk capacity and is unrelated to virtualizing Fibre Channel identifiers per port.