I was reading this article here and had a thought ...

If Henry's vision of a 2nd(3rd) more secure internet ever came into fruition wouldn't it necessitate just cordoning off a section of the present infrastructure creating like a dedicated partition of present T lines etc.
what I mean is, wouldn't such a '3rd internet' still theoretically be accessible to 'outsiders' no matter how dedicated or secure the section is??

Im certainly no Tech-guru ... just asking ...