Here I have listed some major differences between NFS3 and NFS4.Security has been major improvement taken into account for developing NFS4 version.Version NFS 4.1 is in development stage includes pNFS mechanism.
NFSv3
|
NFSv4
|
|
Personality-
|
Stateless protocol
|
Stateful protocol
|
Semantics-support
|
Support UNIX only
|
Support UNIX and Windows
|
Authentication type
|
Weak -(AUTH_SYS)
|
Strong -(Kerberos)
|
Identification type
|
32-bit UID/GID
|
String based (xyz@blogspot.com)
|
Permissions type
|
UNIX based access
|
Windows like access
|
Transport protocol
|
UDP and TCP
|
TCP only
|
Caching data
|
Ad-hoc
|
Delegations
|