Wide Area Networks (WANs)
Companies and large organizations with lots of computers require access options that aren’t available through small-scale technologies such as dial-up and DSL. One crucial question is how to connect branch offices in different locations through an exclusive link that approximates a local network in privacy and provides adequate performance at high usage levels. This question gave rise to the development of the wide area network (WAN).
WAN technologies offer fast, high-bandwidth networking over large distances. Although WAN performance is not as fast as the performance of a LAN, it is typically much faster (and more secure) than using standard networking techniques to connect to a remote location over the open Internet. ...
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