Interestingly, as layers and layers and layers have been added,
  the basic concept of a "port" - "input / output" has become a
  strange, convoluted thing, which really isn't that hard, but
  it's made to be purposely hard. *Keeps people employed. They've
  gone from being "ports" into being "communications protocols".
  Why? *Well, if they didn't, I'd be able to type on your screen
  right now... which would be damned cool. *[by the way, I can do
  that. *I'm doing it right now]
  [1]https://en.wikipedia.org/wiki/Communications_protocol

References

  Visible links
  1. https://en.wikipedia.org/wiki/Communications_protocol

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