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…

Virtual SAN (vSAN) creates a datastore by aggregating local disks from multiple ESXi hosts into a single pool, but it is a hyper-converged storage solution and does not traditionally "span" disparate SAN LUNs and local disks as extents.

NFS (Network File System) datastores are file shares mounted from a NAS device; they are presented as a single share and cannot be extended by directly adding separate LUNs or local storage extents within vSphere.

iSCSI is a protocol used to present block storage (LUNs) to ESXi hosts, but it is not a datastore type itself; rather, VMFS or other file systems are created on top of iSCSI LUNs.

VMFS (Virtual Machine File System) is a clustered file system specifically designed for vSphere that allows for the creation of datastores that can span multiple physical LUNs (extents), aggregating their capacity into a single logical volume that can be expanded dynamically.