ZyXEL Communications N220 - V1.0 Guide de l'utilisateur télécharger pdf (Page 143)

Appendix B Wireless LANs

N220 User’s Guide

143

4 The RADIUS server distributes the PMK to the AP. The AP then sets up a key

hierarchy and management system, using the PMK to dynamically generate

unique data encryption keys. The keys are used to encrypt every data packet that

is wirelessly communicated between the AP and the wireless clients.

Figure 113 WPA(2) with RADIUS Application Example

WPA(2)-PSK Application Example

A WPA(2)-PSK application looks as follows.

1 First enter identical passwords into the AP and all wireless clients. The Pre-Shared

Key (PSK) must consist of between 8 and 63 ASCII characters or 64 hexadecimal

characters (including spaces and symbols).

2 The AP checks each wireless client's password and allows it to join the network

only if the password matches.

3 The AP and wireless clients generate a common PMK (Pairwise Master Key). The

key itself is not sent over the network, but is derived from the PSK and the SSID.

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ZyXEL Communications N220 - V1.0 Guide de l'utilisateur Page 143