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
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.
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