Internet TCP port 530 is primarily used by the Remote Procedure Call (RPC) protocol. This protocol allows a program on one computer to execute a program on a server computer. For example, the Network File System (NFS) uses RPC to allow a client computer to access files over a network in a manner similar to how local storage is accessed. Another example is the Distributed Computing Environment (DCE) that also uses RPC for communication between different components in a network.
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