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The awk scripting language was originally developed as a pattern-matching language for writing short programs to perform data manipulation tasks. It was never meant to be used for networking purposes. awk´s strength is the manipulation of textual data that is stored in files. If we want to exploit its features in a networking context, we have to use an access mode for network connections that resembles the access of files as closely as possible. Therefore we have the following three special files (listed in descending order of importance). These files let us use the protocols of the same name for establishing connections.

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