/exports *(ro,fsid=0,no_subtree_check) 
/exports/backup 172.16.250.0/255.255.255.0(rw,no_subtree_check) 
/exports/documents 172.16.250.0/255.255.255.0(ro,no_subtree_check) 
/exports/public 172.16.250.0/255.255.255.0(rw,no_subtree_check)
