What is a Socket?


Recently, while reviewing the FAQ, I came across the question “What’s a Socket?” For those who are not familiar, I shall explain.

In brief, a Unix Socket (technically, the correct name is Unix domain socket, UDS) allows communication between two different processes on either the same machine or different machines in client-server application frameworks. To be more precise, it’s a way of communicating among computers using a standard Unix descriptors file.

Every UNIX systems Input/Output action is executed by writing or reading the descriptor file. A Descriptor file is an open file, which is associated with an integer. It can be a network connection, text file, terminal or something else. It looks and behaves much like a low-level file descriptor. This happens because the commands like read () and write () works with the same way they do with the files and pipes.

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