I think it means to reprogramme the brain, to change the settings, to change the connections; basically, to change the wiring circuits of the brain, as an electrician would do to a normal, visible circuit in our house. The text is saying that, if it were possible to do that (to adapt the brain's circuits as we wished), our brain would work like the Internet. It already has all the capabilities that would make it similar to the Internet; all it would need would be a man-made adaptation of it.
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