terminals

Hi all, We are required to build a media server for a hospital which will be doing two tasks: 1. Caching web content using Apache and Squid and presenting it to the end users on their bedside terminals 2. Copying movies from another server. A VLC player based service will be used to stream...

Sometimes in a workgroup setup a terminal keeps showing up even after the person has phisically disconnected from LAN... I wish to know what can I do such that it removes that member as soon as he is out or atleast removes when I want it to display only the exixting workgroup members.