Motorola WS2000 System Reference Manual page 288

12-26 WS2000 Wireless Switch System Reference Guide
She clicks the Ok button in the 802.1x-EAP configuration window. She then clicks the WPA-TKIP Settings
button in the security screen.
Clarissa selects the Use WPA choice to enable WPA. WPA is disabled by default.
TKIP encryption protocol calls for keys between two specific nodes to change with every packet. However,
there is no standard with respect to how often one should change keys for broadcast packets. A very busy
network with lots of broadcast packets could generate enough packets for successful decrypting in about an
hour. Clarissa sets the system to rotate the broadcast keys every five minutes.
TKIP requires an initial shared key to start, so that all messages can be encrypted, including the first one.
This initial key setting would be entered in the lower half of this screen, if it were needed. However, if 802.1x
EAP user authentication is enabled, the authentication server will provide the initial key to the client and the
key settings will be grayed out. In this case, Clarissa is using 802.1x EAP user authentication, so she does
not have it enter an initial shared key.