Abstract: Tracking the physical location of a server in a data center including detecting, through a one-wire link between a connector in a cabinet slot and a management module, insertion of the server into a cabinet slot, the server connected upon insertion to a one-wire link through a connector in the cabinet slot and determining, in dependence upon the one-wire link's multiplexer address code, a physical location of the server. The data center includes a plurality of cabinet slots, each cabinet slot having a connector, the data center also includes a presence-detection network, the presence-detection network comprising one-wire links among the cabinet slots and the management module, the one-wire links coupled between the connectors and the management module and multiplexed into the management module according to multiplexer address codes, each one-wire link associated with a separate multiplexer address code, each multiplexer address code associated with a separate physical location.