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An administrator is configuring virtual machines to use Worldwide Port Names (WWPNs) to access the storage.
Which two conditions are required? (Choose two.)
A. The switches in the fabric must be N-Port ID Virtualization aware.
B. The virtual machines must be using passthrough Raw Disk Mapping (RDMp).
C. The virtual machines must be using Virtual Machine Disk (VMDK).
D. The switches in the fabric must be Storage I/O Control aware.
Correct Answer: AB
Explanation/Reference:
Explanation: N-Port ID Virtualization
N-Port ID Virtualization (NPIV) is an ANSI T11 standard that describes how a single Fibre Channel HBA port can register with the fabric using several worldwide port names (WWPNs). This allows a fabric-attached N-port to claim multiple fabric addresses. Each address appears as a unique entity on the Fibre Channel fabric
How NPIV-Based LUN Access Works
NPIV enables a single FC HBA port to register several unique WWNs with the fabric, each of which can be assigned to an individual virtual machine. SAN objects, such as switches, HBAs, storage devices, or virtual machines can be assigned World Wide Name (WWN) identifiers. WWNs uniquely identify such objects in the Fibre Channel fabric. When virtual machines have WWN assignments, they use them for all RDM traffic, so the LUNs pointed to by any of the RDMs on the virtual machine must not be masked against its WWNs. When virtual machines do not have WWN assignments, they access storage LUNs with the WWNs of their host’s physical HBAs. By using NPIV, however, a SAN administrator can monitor and route storage access on a per virtual machine basis. The following section describes how this works.
Reference: https://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp#com.vmware.vsphere.config_fc.doc_40/esx_san_config/managing_san_systems/ c_nport_id_virtualization.html