The protocol of the volume. Allowed combinations are ['NFSV3'], ['NFSV4'], ['SMB'], ['NFSV3', 'NFSV4'], ['SMB', 'NFSV3'] and ['SMB', 'NFSV4']. Each value may be one of: NFSV3, NFSV4, SMB.
['NFSV3']
['NFSV4']
['SMB']
['NFSV3', 'NFSV4']
['SMB', 'NFSV3']
['SMB', 'NFSV4']
NFSV3
NFSV4
SMB