Similar to SMB i.e, access file system over network like they were local for linux
NFSv4 - user must authenticate like win SMB. supports parallel access to files on multiple servers . runs on tcp/udp 2049
111 runs ONC-RPC open network computing remote procedure call.
nfs auth depends on rpc ‘s options from perms on file system and user perms - uid/gid and groups
/etc/exports file has available file systems on an nfs server and the options