Which datastore type can be extended to span several physical storage extents, including storage Area Network LUNs and local storage devices, in order to create a datastore that fits the needs of your

Virtual SAN (vSAN) is a software-defined storage solution that pools host-local storage but does not support spanning traditional SAN LUNs or local devices as extents.

NFS datastores are network-based file shares managed by the NFS server; they cannot be extended by adding local storage devices or SAN LUNs on the ESXi side.

iSCSI is a storage protocol used to access block storage, not a datastore type itself; it cannot be extended to span multiple physical extents the way VMFS can.

VMFS (Virtual Machine File System) datastores support extents, allowing a single datastore to span multiple physical storage devices including SAN LUNs and local disks. This extensibility lets administrators grow a datastore beyond a single LUN's capacity. No other datastore type in vSphere supports this multi-extent spanning feature.