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School/Enterprise
In this school/enterprise
Wi-Fi architecture, the Access Gateway (AG) and WiNOC (management and RADIUS server) work
together to authenticate wireless users. When a wireless user tries
to access the Internet, the AG intercepts the HTTP (HyperText Transfer
Protocol) request and redirect him/her to an logon page for entering
user name and password information. And then, the entered user name and
password information is sent by the AG to a backend RADIUS server (i.e.,
WiNOC). Network access permissions
of the user are granted only if he/she is a valid user of WiNOC.
If the APs support the IEEE 802.3af PoE (Power over Ethernet) standard, power can be supplied through Ethernet cables from a
PoE hub/switch rather than by alternate current (AC). Therefore, power
cabling is not necessary; only Ethernet cabling is needed. Thus cabling
costs can be reduced. Another benefit of employing PoE is that when any AP
hangs up due to firmware bugs, PoE can be used to restart the
AP.