A building full of servers, to be sure. But also a server site connected to the rest of the global internet and many private networks, internet peering points, cloud computing providers, enterprises and application providers. Some of those connections are inside the building, going server to server. Others require use of wide area networks.
Traditionally there has been a big business model separation between private local networks and public wide area networks. Some of that has converged, as connections between internet domains now generate connectivity revenue both inside and outside the building, blurring the distinctions between local and WAN connections and revenue models.
In a virtualized computing environment, the boundaries will become even more porous.
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