All versions of NFS can use Transmission Control Protocol (TCP) running over an IP network, with NFSv4 requiring it. NFSv2 and NFSv3 can use the User Datagram Protocol (UDP) running over an IP network to provide a stateless network connection between the client and server.
Is NFS over TCP?
The default transport protocol for NFSv4 is TCP; however, the Red Hat Enterprise Linux 5 kernel includes support for NFS over UDP. To use NFS over UDP, include the -o udp option to mount when mounting the NFS-exported file system on the client system.
Which NFS version does support TCP and UDP protocol?
NFS version 2 uses the User Datagram Protocol (UDP) to provide a stateless network connection between the client and server. NFS version 3 can use UDP or TCP running over an IP.
What is NFS in TCP IP?
Considered from the perspective of the TCP/IP protocol suite as a whole, the Network File System (NFS) is a single protocol that resides at the application layer of the TCP/IP (DOD) model. This TCP/IP layer encompasses the session, presentation and application layers of the OSI Reference Model.
Which is better SMB or NFS?
Conclusion. As you can see NFS offers a better performance and is unbeatable if the files are medium sized or small. If the files are large enough the timings of both methods get closer to each other. Linux and Mac OS owners should use NFS instead of SMB.
Is port 2049 UDP or TCP?
Port 2049 Details
Is NFS secure?
NFS is well suited for sharing entire file systems with a large number of known hosts in a transparent manner. However, with ease of use comes a variety of potential security problems. The following points should be considered when exporting NFS file systems on a server or mounting them on a client.
What is port 111 used for?
Side note: UDP port 111 uses the Datagram Protocol, a communications protocol for the Internet network layer, transport layer, and session layer. This protocol when used over PORT 111 makes possible the transmission of a datagram message from one computer to an application running in another computer.
Is NFS still used?
NFS’s usefulness as a distributed file system has carried it from the mainframe era right through to the virtualization era, with only a few changes made in that time. The most common NFS in use today, NFSv3, is 18 years old — and it’s still widely used the world over.
Why NFS is used?
NFS, or Network File System, was designed in 1984 by Sun Microsystems. This distributed file system protocol allows a user on a client computer to access files over a network in the same way they would access a local storage file. Because it is an open standard, anyone can implement the protocol.
Why is NFS stateless?
NFS is stateless; UDP is used as a transport. If a server fails, the client retries. performance transparency. Caching at the client is used to improve performance.
Directory and file access protocol.
|null||no operation but ensure that one can access the server|
|read||read bytes from a file|
|write||write bytes to a file|