Chapter 7 Wireless
VMG1312-B Series User’s Guide
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The following figure shows a WPS-enabled client ( installed in a not ebook com puter) connect ing to a
WPS-enabled access point .
Figure 47 How WPS works
The roles of registrar and enrollee last only as long as t he WPS set up process is active (t wo
m inut es). The next tim e you use WPS, a different device can be t he registrar if necessary.
The WPS connect ion process is like a handshake; only t wo devices part icipat e in each WPS
transact ion. I f you want to add m ore devices you should repeat the process with one of the exist ing
net worked devices and the new device.
Note t hat the access point (AP) is not always t he registrar, and the wireless client is not always t he
enrollee. All WPS-cert ified APs can be a regist rar, and so can som e WPS-enabled wireless clients.
By default , a WPS devices is “ unconfigured”. This m eans that it is not part of an existing net work
and can act as eit her enrollee or registrar ( if it supports bot h functions) . I f t he registrar is
unconfigured, t he securit y sett ings it t ransm it s to the enrollee are random ly-generat ed. Once a
WPS-enabled device has connected t o another device using WPS, it becom es “configured”. A
configured wireless client can still act as enrollee or registrar in subsequent WPS connect ions, but a
configured access point can no longer act as enrollee. I t will be t he registrar in all subsequent WPS
connect ions in which it is involved. I f you want a configured AP to act as an enrollee, you m ust reset
it t o its fact ory defaults.
7.10.9.4 Example WPS Network Setup
This sect ion show s how security set tings are distribut ed in an exam ple WPS set up.
The following figure shows an exam ple network. I n st ep 1 , bot h AP1 and Client 1 are
unconfigured. When WPS is act ivated on both, t hey perform the handshake. I n t his exam ple, AP1
SECURE TUNNEL
SECURITY INFO
WITHIN 2 MINUTES
COMMUNICATION
ACTIVATE
WPS
ACTIVATE
WPS
WPS HANDSHAKE
REGISTRARENROLLEE
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