NFS

NFS (Network File System) 

NFS is a network file system access protocol developed by Sun Microsystems in 1984. It allows users to access files and directories on remote computers as if they were local. NFS is a client-server application where clients send requests to the server via the Remote Procedure Call (RPC) protocol to access files. 

The main features of NFS are: 

• Transparent Access: Allows remote files to be handled without any modification to the software on the client. 
• Heterogeneous Environment: Supports file sharing in environments with different operating systems. 
• Security: Does not encrypt the connection by default, so it is recommended to use additional security measures such as Kerberos or VPN. 
• Versions: The latest version is NFSv4, which supports various authentication tools and access control lists. 

Components and protocols: 

• RPC (Remote Procedure Call): Used for communication between client and server. 
• XDR (External Data Representation): Provides machine-independent encoding of data for transmission over a network. 
• File Descriptors: Used to refer to files on the server, their contents are known only to the server.