to gracefully disengage (i.e., save files, exit applications, and so on) before server shutdowns or reboots. I have explaned similarly points between NFS and CIFS ,which to be provided in the conclusion last report .1.1Sun Microsystems provides NFS version 4 When the NFS protocol was designed, machines were far less powerful than today, networks were more commonly local area networks (LANs) than wide area networks (WANs), and available security mechanisms were relatively easy to exploit. Additionally, although NFS was designed to interoperate between different operating systems, many of the protocol features have favored UNIX file semantics. This history has led to problems in using NFS solutions over the Internet, where security, performance, and interoperability are key. Version 4 of NFS is designed to address these concerns by providing:Improved access and good performance on the InternetStrong security, with security negotiation built into the protocolEnhanced cross-platform interoperabilityExtensibility of the protocolStronger in its support of intranets and the Internet, NFS Version 4 will also provide excellent service in environments currently standardized on earlier versions of NFS. Unlike versions 2 or 3, NFS Version 4 can be an important element in the strategy of enterprises to provide better support for global networks.Although NFS Version 4 owes its general design to previous versions of NFS, it is a self-contained protocol that does not have any dependencies on the previous versions. However, to address backward compatibility with the installed base, Versions 2, 3, and 4 can be supported concurrently. Current users of NFS Versions 2 and 3 may look forward to NFS Version 4 as a reasonable, solid migration strategy to serve their Internet and intranet distributed file system needs.At the time of the publication of this white paper, the NFS Version 4 protocol is still under development by the IETF(1), so, the final standar...
