I have Googled this question, but I still am unsure what the concept is.
In: Technology
In computing, “passthrough” means sending data directly to some destination without applying any of the usual manipulations to it. Passthrough printing means passing data directly to a printer port without modifying that data enroute. For example, terminals will usually interpret certain control sequences as indicating cursor movements, text coloring, etc. These control characters are considered instructions to the terminal itself, and thus, are stripped from the text before it is sent to its destination. When passthrough is activated, those control characters are *not* read as instructions, but are instead sent verbatim to the destination along with the rest of the text. This allows you to send control sequences to the destination that would normally be stripped out by the terminal.
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