An architect is designing a solution that minimizes the storage footprint by utilizing thin provisioning in the datacenter.Which solution should the architect recommend for XenServer shared storage?

NFS (Network File System) is a file-based storage protocol that allows XenServer to connect to storage repositories. When used with XenServer, NFS storage repositories support thin provisioning, which helps minimize the storage footprint by allocating space only as data is written.

CIFS (Common Internet File System) is a file-sharing protocol primarily used by Windows and is generally not recommended or officially supported as primary shared storage for XenServer virtual machine disks.

iSCSI (Internet Small Computer System Interface) is a block-level storage protocol that can be used with XenServer, but its support for thin provisioning depends on the underlying storage array's capabilities, not inherently by iSCSI itself.

Fibre Channel is a block-level storage protocol offering high performance, but like iSCSI, thin provisioning capabilities are provided by the storage array, not Fibre Channel directly.