Hi,
The ENET/100 will allow multiple concurrent connections, but if the students run command that changes the state of the device, this could be a problem. Actually even with a computer multiplexing, state will be very difficult to maintain. If the instrument is stateless, an iblck commad may handle this problem, but will lock all other students out of the device. For info on iblck, check your user manual.
Hope this helps!
Aaron K.
Application Engineer
national Instruments