There are too many machines, sometimes it is time to log in, you can't log in to all machines. At this time, you need to see all the machines in the whole room, and the interface is not successful with the success of the login. So it is time to find it. Not very easy to find.
?
One solution to think of:
When the receiving end is connected to the transmit terminal, they can contact the network through the network, so the case of listening to the network packet, you can know if they have already connected, who is not connected, but now the switch, so I want to be in the transmitter The switch is connected to another computer, and the switch port where the computer is located is set to the surplus port, write a software, listens to the data packet on the network, and determines which computer is not connected to the transmitter according to the MAC address.
Listening to network packets can be used with WinPCAP
