[root@one1-fst-hx ~]# mount.nfs 182.168.2.49:/mnt/sdb/nfs /mnt/nfs2/ nomand,-o vers=3
[root@one1-fst-hx ~]# mount -t,nfs 182.168.2.49:/mnt/sdb/nfs /mnt/nfs2/ nomand,-o vers=4
[root@one1-fst-hx ~]# mount 182.168.2.49:/mnt/sdb/nfs /mnt/nfs2/ -t nfs -o vers=4
[root@one1-fst-hx ~]# mount.nfs 182.168.2.49:/mnt/sdb/nfs /mnt/nfs2/ nomand -o vers=4