WAN technologies operate at the enterprise edge in the modular Cisco enterprise infrastructure. WANs span across large geographical distances in order to provide connectivity for various parts of the network infrastructure. Unlike the LAN environment, some WAN components are not owned by the specific enterprise they serve. Instead, WAN equipment or connectivity can be rented or leased from service providers. Most service providers are well trained in supporting not only traditional data traffic but also voice and video services (which are more delay-sensitive) over large geographical distances.
In addition, unlike LANs, WANs typically have an initial fixed cost and . . .
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