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reality, the data is delivered across a network via the most appropriate route. The
sending and receiving devices do not have to be aware of the options and the route is
chosen only when a message is sent. There is no pre-arrangement, so each virtual
connection exists only for the duration of that one transmission.
WAN
Wide area network - A data communications network that spans any distance and is
usually provided by a public carrier (such as a telephone company or service
provider).