The system of roads that carries goods from point A to point B is not 'free', it's taxpayer-financed. Governments could also use tax revenue to pay for nationwide fiber-optic systems that carry information from point A to point B.
Note 'paying for' doesn't mean hiring private contractors to run the system, it means having government employees run the systems while relying on the competitive private sector for things like manufacturing fiber optic cable (comparable to the road system, where equipment like road graders is privately manufactured).
If congestion becomes a problem, as with roads, alternatives like trains for public transit to reduce traffic loads are also plausible. Regardless, those who claim there is a competitive free market solution to the issue of basic infrastucture are either highly ignorant or just pushing for private monopoly control with high rents.