sity, the library has two floors with books, and another entire floor with carrels where students and faculty study, do research, and access the Internet. Wi-Fi is additionally available for guests and neighborhood residents who are able to hop on a "guest" segment of Wi-Fi where they can reach the Internet, but not any private, confidential files or databases. In a similar manner, hospitals have Wi-Fi throughout their administrative offices and patient floors. Like universities, they provide guest Wi-Fi for visitors and patient rooms. In warehouses, Wi-Fi is used for communicating with automated systems that track packages. Wi-Fi Architecture in Enterprises Wi-Fi networks are within buildings but are connected by cabling to the wired LAN. All Wi-Fi networks have access points and user devices. The computer chips in portable user devices must be compatible with that used in the base station and access point. For example, a user www.TechnicalPDF.com device cannot use 802.11ac capabilities without an 802.11ac chip in their device. Enterprise Wi-Fi networks have multiple access points and often controllers that direct traffic to particular access points. Central monitoring software can be used to remotely change access point configurations and monitor traffic on the Wi-Fi network. Wi-Fi access points are connected to switches in each floor's wiring closets. See Figure 7-14 for an example of a connection between access points and the wired local area network. The point is, Wi-Fi is a way to connect internal wireless transmissions to enterprise LANs, which then transmit Wi-Fi-originated traffic to the Internet or to staff within the building or campus. A Wi- Fi controller or router is plugged into a port on Ethernet switches at enterprises. www.TechnicalPDF.com Controller can be on-site, in the Wiring closet switch cloud or at a provider's data center Floor3 Floor2 Management console Floor 1 Statistics on usage Information on congestion Reports on security Identities of allowed users Copper cabling Console can be in c