April 2011
Intermediate to advanced
368 pages
11h 36m
English
Content preview from Secure Roaming in 802.11 Networks
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Chapter 5
network via another VLAN. Because 802.11 requires that a single radio only beacon a single
SSID, one of these two SSIDs will be hidden. A client wishing to associate with a hidden
SSID must have a priori knowledge of this SSID through configuration information, and must
discover its presence via directed probes since the second SSID cannot also send beacons.
In the roaming context, as truly fast roaming is only realistic within the same SSID family, an
implementation may want to maintain information about neighboring APs with the same SSID
as current as possible, yet relax that urgency with regard to APs with different SSIDs. Thus, to
drift ...
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