hi
we have a lan network that works with a 16port switch we also have win server 2008 on one of the puters in the network, there is an ADSL modem connected to the switch which provides the clients with internet, here is my question how can we control how much of the bandwidth any of the clients use? a program or something? or a way with the switch itself maybe?
thanks

I know it is one of the included roles, probably Active Directory with network load balancing
-edit, you might need more than one server(not sure)http://technet.microsoft.com/en-us/library/cc732855(WS.10).aspx
there is probably a simpler solution out there, but this is one

Most switches have some level of native throttling at fixed speeds (they usually cant do too many). If those levels are not enough you might think of using Dummynet between the gateway device and the clients (or just after the gateway device depending on your setup). Dummynet allows you to choose 'pipes' specific to endpoints and fix traffic levels within each pipe individually. So, you might say all traffic from host A gets on 128Kbps while host B gets 1Mbps and so on.