Can anyone tell me if there is a software or command to detect unused ports on a network. Let's say - you are a network administrator and you are incharge of 42 hubs each with hub containg 100 ports all connected with a patch cable. Your Line manager has just informed you that the Dept need to cut back and each port that is not being used because it costs £3000 to run that service Is there a program you can run to detect when a port was last used. when a computer was attached to that port and the port was live. We often get staff moving or leaving but don't tell IT Dept and therefore the network port in that office is still live. However when new staff arrive and more network ports are needed we then find there is not enough space in the hub/rack to add another switch. Any suggestions?