Looking at the
/data filesystem we can see that the filesystem type is set to
nfs4. This filesystem type means that the filesystem is a Network Filesystem (NFS).
NFS is a service that allows a server to share an exported directory with other remote servers. The
nfs4 filesystem type is a special filesystem that allows the remote servers to access this service as if it was a standard filesystem.
4 in the filesystem type denotes the version to use, which means the remote server is to use Version 4 of the NFS protocol.
Currently, the most popular versions for NFS are versions 3 and 4, with 4 being the default for Red Hat Enterprise Linux 6 and 7. There are quite a few differences between version 3 and version 4; however, ...