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3 how wps works – ZyXEL Communications NWD-270N User Manual

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Chapter 2 Wireless LANs

NWD-270N User’s Guide

23

The following figure shows a WPS-enabled wireless client (installed in a notebook computer)
connecting to the WPS-enabled AP via the PIN method.

Figure 5 Example WPS Process: PIN Method

2.4.3 How WPS Works

When two WPS-enabled devices connect, each device must assume a specific role. One device
acts as the Registrar (the device that supplies network and security settings) and the other
device acts as the Enrollee (the device that receives network and security settings. The
registrar creates a secure EAP (Extensible Authentication Protocol) tunnel and sends the
network name (SSID) and the WPA-PSK or WPA2-PSK pre-shared key to the enrollee.
Whether WPA-PSK or WPA2-PSK is used depends on the standards supported by the devices.
If the registrar is already part of a network, it sends the existing information. If not, it generates
the SSID and WPA(2)-PSK randomly.

ENROLLEE

SECURE EAP TUNNEL

SSID

WPA(2)-PSK

WITHIN 2 MINUTES

COMMUNICATION

This device’s

WPS

Enter WPS PIN

WPS

from other device:

WPS PIN:

123456

WPS

START

WPS

START

REGISTRAR