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Chapter 7 Wireless
The following figure shows an example network. In step 1, both AP1 and Client 1 are unconfigured.
When WPS is activated on both, they perform the handshake. In this example, AP1 is the registrar, and
Client 1 is the enrollee. The registrar randomly generates the security information to set up the network,
since it is unconfigured and has no existing information.
Figure 48 WPS: Example Network Step 1
In step 2, you add another wireless client to the network. You know that Client 1 supports registrar mode,
but it is better to use AP1 for the WPS handshake with the new client since you must connect to the
access point anyway in order to use the network. In this case, AP1 must be the registrar, since it is
configured (it already has security information for the network). AP1 supplies the existing security
information to Client 2.
Figure 49 WPS: Example Network Step 2
In step 3, you add another access point (AP2) to your network. AP2 is out of range of AP1, so you cannot
use AP1 for the WPS handshake with the new access point. However, you know that Client 2 supports
the registrar function, so you use it to perform the WPS handshake instead.
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