A local area network (LAN) has computer systems situated geographically ____, usually within the ____ or small site, like a ____ or ____. The network infrastructure of a LAN (such as servers and routers) is usually ____ and managed by the ____. A wide area network (WAN) has computer systems situated geographically ____ to each other, possibly across a ____ or even ____. WANs often use ____ communication channels, such as connections by internet services providers like ____ or Virgin Media.

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