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What is Socket Programming?
A socket allows communication between two different processes on the same machine or different machines. In other words, it is a way to talk to other computers using standard Unix file descriptors. In Unix, every I/O operation is done by writing to or reading from a file descriptor. A file descriptor can be an integer with an open file, and it can be a network connection, a text file, a terminal, or something else. To a programmer, a socket behaves like a low-level file descriptor. This is because commands like read() and write() work with sockets in the same way they work with files and pipes. Socket programming is a way for two nodes on a network to communicate with each other. A socket (node) listens on a specific port on the IP, until another socket arrives to establish a connection. The server establishes a listening socket until the client reaches the server.

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