A company use a router connected to internet. A Dlink3226 as the central switch.
The network topology diagram:
In this issue, we only need to do port mirroring in the Dlink3226 to do monitoring.
Dlink 3226 port mirror configuration:
As in the diagram above, port 16 is connected with the router and port 1 is connected to the computer with WFilter installed on.
By now, you can monitor all the wireless computers.