11
Figure 4 Passive scanning
Authentication
To secure wireless links, the wireless clients must be authenticated before accessing the AP, and
only wireless clients passing the authentication can be associated with the AP. 802.11 links define
two authentication mechanisms: open system authentication and shared key authentication.
For more information about the two authentication mechanisms, see "Configuring WLAN security."
Association
A client that wants to access a wireless network through an AP must be associated with that AP.
Once the client chooses a compatible network with a specified SSID and passes the link
authentication to an AP, it sends an association request frame to the AP. The AP detects the
capability information carried in the association request frame, determines the capability supported
by the wireless client, and sends an association response to the client to notify the client of the
association result. Usually, a client can associate with only one AP at a time, and an association
process is always initiated by the client.
Hardware compatibility with WLAN
WLAN is not available on the following routers:
• MSR 2600.
• MSR 30-11.
• MSR 30-11E.
• MSR 30-11F.
• MSR3600-51F.
Workgroup bridge mode overview
The workgroup bridge mode enables an AP to associate with another AP as a wireless client.
As shown in Figure 5, to provide wirele
ss connectivity for the PCs and printer, you can connect them
to an AP through a hub or a switch and configure the AP as a workgroup bridge. The PCs and printer
access the network through the workgroup bridge.
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