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Internet @ the Physical Layer

(Tech The Future section)

Internet @ the Physical Layer
The Internet consists of some 40,000 administratively separate networks linked together. How does this system-of-systems operate at the physical layer? Is it flakey and unreliable as some corporations hanging on to their private connections seem to think? Can it handle the persistent growth of data volumes? Is it expanding to reach the billions of poorly connected people in developing countries? Let’s ask the specialists.
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