Wide Area Networks. Computer Networks. Motivation. Connect multiple sites Span geographic distances Cross public right-of-way streets buildings railroads. Building blocks. Point-to-point long distance connections leased circuits provided by telecommunications companies Packet switches
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The aim was to combine the flexibility of packet data networks (e.g. Internet) with the per-user quality of service guarantees of a circuit switched network (e.g. telephone network). A monumental task! Although an important technology, it may follow the path of similar technologies (e.g. Token Ring). Stay tuned.