In a windowless office inside a low-lying building in the dust and heat of Las Vegas, Philip Brody gestures toward a large map hanging on the wall behind him. It's a diagram of what might be the most sophisticated wide-area network (WAN) of any K-12 school district in the country.

The map shows a series of rings that are interconnected by fiber-optic backbones. Each ring, which represents an area of the county, has four leaves. At the network's core are two Tier 1 sites that connect to the internet and feed it to the various

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